The Logitech MX Keys S Combo bundles the MX Keys S keyboard with the MX Master 3S mouse at a combined price that undercuts buying both separately by $40–$50. If you are building a new desk setup and want the full Logitech productivity ecosystem — including Logi Flow multi-computer switching — the combo is a compelling package. But if you already own an MX Master 3S or prefer a different mouse, the standalone keyboard is the smarter purchase. This guide breaks down exactly who should bundle and who should skip it.
Bottom Line: Which Should You Buy?
Best if You Already Have a Mouse
Logitech MX Keys S (keyboard only)
Best Bundle Value
MX Keys S Combo (keyboard + MX Master 3S)
MX Keys S (Keyboard Only)
Verdict: The right choice if you already have a quality mouse, want mouse flexibility, or are upgrading only your keyboard. Identical keyboard to the combo with no trade-offs.
Best for: Existing MX Master 3S owners, users wanting mouse flexibility
MX Keys S Combo
Verdict: Best value for new desk builds. Saves $40–$50 versus buying separately and delivers the complete Logitech Flow productivity ecosystem in one box.
Best for: New setups, Logi Flow users, complete ecosystem buyers
What You Get: Full Comparison
| Feature | MX Keys S Only | MX Keys S Combo | Winner |
|---|---|---|---|
| What Is Included | MX Keys S keyboard + Logi Bolt receiver | MX Keys S keyboard + MX Master 3S mouse + Logi Bolt receiver | Combo |
| Keyboard | MX Keys S (identical) | MX Keys S (identical) | Tie |
| Mouse Included | No | Yes (MX Master 3S) | Combo |
| MagSpeed Scroll | N/A | Yes (via MX Master 3S) | Combo |
| Logi Flow Ready | Keyboard only | Full Flow (keyboard + mouse) | Combo |
| Typical Price | ~$110–$120 | ~$170–$190 | Keys S Only |
| Savings vs Buying Separately | N/A | ~$40–$50 vs buying individually | Combo |
| Best For | Users who already own MX Master 3S | New desk setups, complete Logitech ecosystem | Tie |
MX Keys S Standalone — Review
The standalone MX Keys S is Logitech's best productivity keyboard. Scissor switches with spherical keycaps provide accurate, quiet typing well-suited to office environments. The proximity sensor illuminates the white backlight as your hands approach, and turns it off when you step away — saving battery and adding a small but satisfying detail. Logi Options+ provides per-application key remapping so the same function key can do different things in different programs. Multi-device switching handles three Bluetooth connections or uses the included Logi Bolt USB receiver for rock-solid wireless reliability. If you already own an MX Master 3S or have a mouse you love, the keyboard-only option makes complete sense.
Pros
- Lower upfront cost — ideal if you already own a mouse or prefer a different mouse brand
- Identical keyboard to the combo — no quality difference in the keyboard itself
- Flexibility to pair any mouse, including a gaming mouse or different ergonomic option
- Smart backlight proximity sensor included and fully functional as standalone keyboard
- Includes Logi Bolt USB receiver for stable wireless connection on devices without reliable Bluetooth
Cons
- No mouse included — you pay separately for an MX Master 3S if you want the full ecosystem
- Buying keyboard + MX Master 3S separately costs $40–$50 more than the combo
- Logi Flow requires both a compatible keyboard and mouse — keyboard alone is only half the equation
- No bundle discount — you are paying retail price for the keyboard without savings
MX Keys S Combo — Review
The MX Keys S Combo adds Logitech's best productivity mouse — the MX Master 3S — to the keyboard package at a price that saves $40–$50 versus buying both at retail. The MX Master 3S brings MagSpeed scroll (which hits 1,000 lines per second in free-spin mode), a horizontal thumb scroll wheel, a programmable gesture button, and 8,000 DPI precision. Together with the MX Keys S, Logi Options+ unlocks Flow: a feature that lets the mouse cursor move between two computers as if they were one, carrying the clipboard contents along. For a new desk build or a professional setting up a dual-computer workstation, the combo delivers exceptional value and a cohesive setup that would be hard to beat at any price point near $200.
Pros
- Saves $40–$50 compared to buying the MX Keys S keyboard and MX Master 3S separately at retail
- Enables full Logi Flow out of the box — cursor and clipboard move between two computers seamlessly
- MX Master 3S MagSpeed scroll wheel pairs perfectly with the MX Keys S for a complete productivity system
- One purchase, one setup, one Logi Options+ configuration — less decision fatigue for new desk builds
- Matching design language between keyboard and mouse creates a cohesive, polished desk aesthetic
Cons
- Higher total price — not the right choice if you already own an MX Master 3S or another quality mouse
- Locks you into the MX Master 3S even if a different mouse would suit your hand better
- Combo deals can sometimes be harder to find in specific colors (Graphite, Pale Grey)
- No additional accessories beyond keyboard and mouse — no palm rest, wrist rest, or cable management
Which Should You Buy?
Buy the standalone MX Keys S if…
- You already own an MX Master 3S or another mouse you are happy with
- You want a gaming mouse or different ergonomic mouse alongside the keyboard
- You are on a tighter budget and only need the keyboard upgrade
- You need a specific color that the combo does not offer
Buy the MX Keys S Combo if…
- You need both a new keyboard and a new mouse for a fresh desk build
- You want Logi Flow multi-computer cursor and clipboard sharing
- The $40–$50 savings versus buying separately are meaningful to you
- You want a matching, cohesive Logitech aesthetic across keyboard and mouse
How We Chose These Products
- Bundle value calculated against real-world retail prices across major retailers over 30 days
- Logi Flow functionality tested across macOS and Windows in dual-computer workstation scenarios
- Logi Options+ software evaluated for ease of setup and feature breadth
- Physical compatibility assessed between keyboard and mouse for coordinated desk use
- Savings verified against promotional and non-promotional pricing periods
Frequently Asked Questions
How much does the MX Keys S Combo save compared to buying separately?
The MX Keys S keyboard typically retails at $110–$120 and the MX Master 3S at $99. Buying both at retail would cost $209–$219. The MX Keys S Combo typically sells for $170–$190, saving you $30–$50 depending on sales and retailer pricing.
Is the keyboard in the combo the same as the standalone MX Keys S?
Yes. The MX Keys S in the combo is identical to the standalone keyboard in every hardware respect — same keys, same backlight, same Logi Bolt receiver, same Logi Options+ compatibility. There is no difference in the keyboard itself.
What is Logitech Flow and do I need both keyboard and mouse for it?
Logi Flow is a feature in Logi Options+ that allows a compatible Logitech mouse to move the cursor between two connected computers when you reach the edge of the screen — and copies text/files between them via a shared clipboard. You need both a Flow-compatible mouse (like the MX Master 3S) and a computer with Logi Options+ installed. The keyboard is not strictly required for Flow, but the combo gives you the complete ecosystem.
Should I buy the combo if I already have a Logitech MX Master 3S?
No — buy the standalone MX Keys S keyboard. You already have the mouse, so paying for the combo means paying for a duplicate MX Master 3S you do not need. The keyboard-only purchase is the better value in that scenario.
Does the combo come with a palm rest or wrist rest?
No. The MX Keys S Combo includes only the keyboard and mouse (plus the Logi Bolt USB receiver). Logitech does sell the MX Palm Rest separately as an optional accessory for the MX Keys S keyboard.
Can I use the Combo with both Mac and Windows?
Yes. Both the MX Keys S and MX Master 3S support Mac and Windows via Bluetooth or Logi Bolt. Logi Options+ runs on both operating systems and supports per-OS key mapping, so the function keys and shortcuts adjust automatically when you switch between a Mac and a Windows PC.
Is the MX Master 3S in the combo the same as the standalone version?
Yes. The MX Master 3S included in the combo is the same mouse sold individually — same sensor, same MagSpeed scroll wheel, same programmable buttons, same rechargeable battery. No compromises are made in the bundled version.
Does the combo use one Logi Bolt receiver for both keyboard and mouse?
Yes. The combo includes a single Logi Bolt USB receiver that pairs with both the keyboard and mouse simultaneously, occupying only one USB port. This is one of the practical advantages of the Logitech ecosystem over mixing brands.