G: TLDR: You’re basically looking for a full-size Logitech-style office keyboard with Bluetooth, integrated palm rest, media keys, and some physical heft. The closest modern matches are:

• Logitech K780 → closest “Logitech feel,” multi-device, but slightly compacted layout
• Logitech K650 (Signature) → closest shape + comfort, but dongle-first (Bluetooth exists via Bolt workaround)
• Logitech MX Keys (full) → premium version, very close layout, but slimmer / less “grabby”
• Microsoft Bluetooth Keyboard (full size) → clean layout, but less tactile + no palm rest

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What you actually have (baseline)

You’re using a entity["product","Logitech K520"] — that tells me:

• Full 104-key layout + numpad
• Slightly curved, soft-touch keys
• Integrated palm rest (this matters more than people think)
• Dedicated media + volume buttons
• Chunky enough to pick up one-handed without flexing

That last point is the hardest thing to replicate today. Most modern keyboards got thinner and lighter.

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Closest modern equivalents

1. Best overall match (function + feel)

entity["product","Logitech K780 Multi-Device Wireless Keyboard"]

image_group{"aspect_ratio":"1:1","query":["Logitech K780 keyboard top view","Logitech K780 desk setup","Logitech K780 keys close up"],"num_per_query":1}

Why it matches:

• Full layout with numpad
• Dedicated media keys (function row dual-use)
• Solid weight (doesn’t feel flimsy)
• Bluetooth + multi-device switching
• Still very “Logitech office keyboard DNA”

Where it differs:

• Round keys (you’ll notice it for ~1–2 days)
• Built-in device cradle (you may not care)
• Slightly tighter spacing than K520

Verdict: Closest functional successor to what you’re used to.

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2. Closest physical feel (but with a caveat)

entity["product","Logitech Signature K650 Wireless Keyboard"]

image_group{"aspect_ratio":"1:1","query":["Logitech K650 keyboard palm rest","Logitech K650 full layout","Logitech K650 office setup"],"num_per_query":1}

Why it matches:

• Very similar shape + palm rest + key feel
• Full-size, familiar spacing
• Media keys + volume control
• “Grab it with one hand” sturdiness still there

Problem:

• It’s primarily Logitech Bolt dongle, not native Bluetooth-first
• (Some setups can pair via Bluetooth depending on model variant, but it’s not its main identity)

Verdict: This is basically a modern K520, but it fails your “no dongle” preference unless you compromise.

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3. Premium version (if you’re okay losing some bulk)

entity["product","Logitech MX Keys (Full Size)"]

image_group{"aspect_ratio":"1:1","query":["Logitech MX Keys full size keyboard","MX Keys backlit keys close up","MX Keys desk setup"],"num_per_query":1}

Why it matches:

• Full layout + numpad
• Excellent Bluetooth multi-device switching
• Media + volume controls
• High build quality

Where it diverges:

• Low-profile (laptop-style) keys
• No palm rest
• Less “grab handle” feel — more slab than tool

Verdict: Best modern upgrade, but not the same physical experience.

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4. Clean alternative (non-Logitech)

entity["product","Microsoft Bluetooth Keyboard (Full Size)"]

image_group{"aspect_ratio":"1:1","query":["Microsoft Bluetooth Keyboard full size black","Microsoft keyboard top view minimal","Microsoft keyboard desk setup"],"num_per_query":1}

Why it matches:

• Full layout
• Native Bluetooth
• Simple, no nonsense

Where it falls short:

• No palm rest
• Minimal media controls
• Feels lighter / less “anchored”

Verdict: Functional, but you’ll feel the downgrade in physical presence.

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Straight answer (no hedging)

If your priorities are:

• Layout fidelity + Bluetooth + still feels like a real object → K780
• Exact feel + comfort + palm rest (but dongle compromise) → K650
• Modern + clean + premium → MX Keys

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The uncomfortable truth (worth stating)

What you like about the K520 — especially the grabbable bulk + integrated palm rest + slightly raised frame — is exactly what the industry moved away from.

So:

• You can match functionality (easy)
• You can match feel (somewhat)
• You cannot perfectly match both + Bluetooth in one device anymore

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If you want, I can narrow this down harder (like “closest possible 1:1 even if it’s obscure or discontinued” vs “best modern replacement you won’t regret”).

G: TLDR: Yes — that does change the answer.
If you want higher keys (more travel / “real keyboard” feel), the standard MX Keys is actually the wrong direction. You want either:

• MX Mechanical (Logitech) → closest modern Bluetooth upgrade with higher keys
• Keychron K10 (or similar full-size mechanical) → closest to old-school “tall key” feel
• Or a rare middle-ground like K650 (but you already know the tradeoff)

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What you’re really describing now

You just clarified something important:

You don’t mind responsiveness → but you do care about key height

That means you’re moving from:

• “scissor switch / laptop-style” → ❌ (MX Keys lives here)
• toward:
• membrane with deeper travel OR mechanical switches → ✅ (closer to your K520)

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The corrected recommendations

1. Closest “modern Logitech, but with real key height”

entity["turn0product16","Logitech MX Mechanical (Full Size)"]

Why this fits better than MX Keys:

• Full-size layout
• Bluetooth + dongle option
• Noticeably taller keys than MX Keys
• More defined keypress (not mushy, not flat)
• Still feels like a tool, not a slab

Reality check:

• It’s not as soft/membrane as your K520
• It will feel more “precise” and slightly firmer

👉 This is the closest true upgrade path from what you have without losing modern features.

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2. Closest to your actual old keyboard feel (but modern + Bluetooth)

entity["turn0product39","Keychron K10 Wireless Mechanical Keyboard"]

Why this is important:

• Full-size, no compromises
• Tall, traditional keycaps (closest to old office keyboards)
• Bluetooth native
• Heavy enough to pick up one-handed (your requirement)

What changes:

• Mechanical switches = more “click/feedback” than K520
• You can choose quieter switches (red/brown) to avoid noise

👉 If your brain is saying “I want my old keyboard but better,” this is the honest answer.

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3. The “same shape, softer keys” compromise

entity["turn0product43","Logitech Signature K650"]

Why it’s still relevant now:

• This is basically your K520 reincarnated
• High-ish keys (for membrane)
• Palm rest + familiar spacing

Updated note:

• It does support Bluetooth Low Energy alongside the dongle citeturn0product43

👉 This becomes more viable than I implied earlier.

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4. Honorable mention (hybrid comfort route)

entity["turn0product0","Logitech Wave Keys"]

• Higher keys than MX Keys
• Built-in palm rest
• Bluetooth
• Slight ergonomic curve (not extreme)

👉 If comfort mattered more than layout purity, this would creep up the list.

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Straight answer (no hedging)

Your preferences now clearly point to:

• ❌ MX Keys (standard) → too flat, wrong direction
• ✅ MX Mechanical → best balance of modern + familiar
• ✅ Keychron K10 → best feel match to what you’re used to
• ⚠️ K650 → safest, least disruptive, but slightly less “modern”

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The key distinction (this is the real fork)

You’re choosing between two philosophies:

A. “Feels like my old keyboard, just Bluetooth now”

→ Keychron K10

B. “Modern keyboard, but still has real keys”

→ MX Mechanical

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If you want me to narrow this down to one based on how you actually type (heavy press vs light touch, noise tolerance, etc.), I can cut it to a single pick.

G: Short answer:
Yes — the MX Mechanical is Bluetooth. The dongle you saw is optional.

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What’s actually going on (no marketing fluff)

entity["turn0product0","Logitech MX Mechanical"]

• ✅ Bluetooth (native) — works directly with your computer, no dongle needed
• ✅ USB receiver (Logitech Bolt) — optional alternative
• ✅ Can store up to 3 devices and switch between them
• Same system your mouse likely uses

Logitech explicitly lists Bluetooth as a core feature, not a fallback citeturn0search0

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Why the dongle exists (and why it confused you)

You’re basically seeing two parallel systems:

1. Bluetooth (what you want)

• Clean, no USB port used
• Slightly more latency (usually irrelevant unless gaming)
• Works across anything modern

2. Logitech Bolt receiver (the dongle)

• Lower latency / more stable in crowded wireless environments
• Lets multiple Logitech devices share one receiver
• More “enterprise / office reliability” focus

👉 It’s exactly like your mouse situation:
You can ignore the dongle completely if you want.

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Important nuance (this matters for you specifically)

Given your preferences:

“I pick it up one-handed by the corner”

• MX Mechanical is heavier and more rigid than MX Keys → good
• But still flatter than your K520 → noticeable difference
• No palm rest → actually helps your footprint concern

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Reality check vs your original keyboard

Feature	K520 (yours)	MX Mechanical
Bluetooth	❌	✅
Key height	Medium	Medium-low (but higher than MX Keys)
Feel	Soft membrane	Firm mechanical
Weight / grab	Good	Good
Palm rest	Built-in	❌

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Blunt recommendation (based on everything you’ve said)

You’ve basically narrowed yourself to:

If you want:

• “Modern Logitech, clean, Bluetooth, no nonsense” → MX Mechanical ✔

If you really meant:

• “I want the same physical feel as my current keyboard” → This will NOT perfectly replicate that

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One subtle thing you might not have considered

You said:

“Key reaction is not a problem”

That’s slightly misleading (and I’m going to push back here):

Mechanical keyboards (MX Mechanical included) don’t just change reaction — they change:

• Force curve
• Bottom-out behavior
• Sound profile
• Finger fatigue pattern

You’ll notice it within minutes.

Not bad — just different.

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Bottom line

• Yes, MX Mechanical is fully Bluetooth
• The dongle is optional, not required
• It’s the correct modern choice given your constraints
• But it will feel more precise / less cushioned than what you’re used to

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If you want, I can get extremely specific and match you to the exact switch type (that’s the difference between “this feels right” and “this feels wrong” with mechanical boards).

G: TLDR:

• MX Mechanical: solid, but battery + low-profile mechanical = likely 5–8 years real-world
• Keychron K10: built like older keyboards → easily 10+ years, often longer
• Your K520 lasting ~12 years? → That aligns more with Keychron than MX Mechanical

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Let’s be blunt about durability (this is the real split)

🟩 Mechanical keyboards (Keychron side)

entity["turn0product1","Keychron K10 Max Wireless Mechanical Keyboard"]

• Mechanical switches are typically rated for 50+ million keypresses citeturn0search5
• Real-world lifespan: 5–15 years (often longer with care) citeturn0search1
• Many parts are replaceable (keycaps, switches, sometimes battery)

Key advantage:
If something wears out, you fix it, not replace the whole board.

👉 This is why people still use 10–20-year-old mechanical keyboards.

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🟦 Logitech MX Mechanical

entity["turn0product0","Logitech MX Mechanical Wireless Keyboard"]

What’s different here:

• Still mechanical switches (good)
• But:
  • Low-profile switches (shorter lifespan in practice, even if specs look similar)
  • Built-in battery (non-trivial to replace)
  • More integrated design → less repairable

Translation:

• The switches themselves are durable
• The keyboard as a system is less so

👉 Expect:

• ~5–8 years typical lifespan
• Battery degradation will likely be the first failure point

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The real comparison (this is the part that matters)

Factor	MX Mechanical	Keychron K10
Switch lifespan	High	High
Repairability	Low	High
Battery replaceable	Difficult	Easier / or wired fallback
Build philosophy	Integrated	Modular
Real-world lifespan	~5–8 yrs	10+ yrs common

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One thing you implicitly care about (you didn’t say it directly)

Your current keyboard lasted 12–13 years.

That tells me:

• You don’t churn hardware
• You don’t want something disposable
• You value consistency over time

That heavily biases toward:

👉 Keychron philosophy > Logitech MX philosophy

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The honest interpretation of your situation

If you choose MX Mechanical:

• You’re buying a refined appliance
• It will feel modern, clean, reliable
• But it’s ultimately replaceable hardware

If you choose Keychron:

• You’re buying a tool
• It will feel more like your current keyboard lineage
• It can realistically outlast your current one

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One subtle but important durability factor

Keycaps:

• Logitech → typically thinner, can wear smooth over time
• Keychron → often PBT keycaps (much more resistant to shine/wear)

That matters over a decade.

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Bottom line (no hedging)

Given your history:

• Your K520 lasted ~12 years
• You care about physical feel + sturdiness

👉 Keychron is the only option here that matches that durability profile

MX Mechanical is still good — just not “decade+ reliable” in the same way.

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If you want, I can narrow the Keychron options (switch type especially) so you don’t accidentally pick something that feels wrong even if it lasts forever.

G: TLDR (clean version):

• K10 (base) = older, simpler
• K10 Pro = modern baseline (good default)
• K10 Max = newest + best wireless + best internals
• K10 HE = different tech entirely (skip unless curious)

If you don’t want to overthink it:
👉 K10 Pro = safe pick
👉 K10 Max = best pick if price difference doesn’t bother you

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The actual lineup (this is where the confusion comes from)

🟩 Base model (older generation)

entity["turn0product4","Keychron K10 (standard)"]

• Bluetooth + wired
• Basic firmware (no deep customization)
• Older internal design

👉 Think: “good, but outdated now”

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🟦 Mid-tier (this is where things start making sense)

entity["turn0product0","Keychron K10 Pro"]

• Bluetooth + wired
• QMK/VIA support (you can remap keys, even if you don’t plan to) citeturn0search0
• Better internal build (foam, sound dampening, etc.)
• Hot-swappable options (replace switches if needed)

👉 This is the baseline modern Keychron

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🟪 New generation (this is the one I’d push you toward)

entity["turn0product2","Keychron K10 Max"]

• Bluetooth + 2.4GHz wireless (dongle) + wired citeturn0product2
• Faster, more stable wireless than Bluetooth
• Same customization (QMK)
• Newer internal design + improved feel

👉 Translation:

• You get Bluetooth for normal use
• AND a “perfect connection mode” if you ever want it

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🟥 Oddball version (not what you want)

entity["turn0product6","Keychron K10 HE (magnetic switches)"]

• Uses Hall-effect magnetic switches
• Adjustable actuation, gaming-focused

👉 This is a different category entirely
Skip it unless you suddenly decide to min-max keyboards.

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What actually matters for you specifically

You’re not chasing:

• macros
• deep customization
• gaming features

You are chasing:

• durability
• feel
• Bluetooth
• full layout
• something you won’t replace in 5 years

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The real differences that matter (no fluff)

Feature	K10	K10 Pro	K10 Max
Bluetooth	✅	✅	✅
2.4GHz (dongle)	❌	❌	✅
Build quality	Good	Better	Best
Internal dampening	Minimal	Improved	Best
Customization	❌	✅	✅
Longevity feel	Good	Very good	Best

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The key decision (this is the only one that matters)

If you want:

• “Set it and forget it, closest to your old keyboard” → K10 Pro

If you want:

• “Same thing, but future-proof and slightly nicer in every way” → K10 Max

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My recommendation (based on everything you’ve said)

You’re:

• replacing a 12-year keyboard
• sensitive to feel
• not trying to fiddle with software
• okay paying for something that lasts

👉 Get the K10 Max

Not because you need the extra features, but because:

• better internals = better long-term feel
• better wireless = fewer weird issues over time
• no downside except price

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One last thing (this will matter more than Pro vs Max)

When you buy it, you’ll choose a switch type:

• Red → smooth, light, quiet
• Brown → slight bump (closest to your current keyboard feel)
• Blue → clicky (you’ll regret this unless you want noise)

👉 For you: Brown

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If you want, I can sanity-check a specific Amazon listing before you buy so you don’t accidentally grab a weird variant (Keychron listings are notoriously messy).