Logitech MX Master 3S vs MX Keys: Do You Need Both or Just One?
If you’ve spent more than five minutes down the Logitech rabbit hole, you already know the MX series is the gold standard for serious home office gear. But here’s the question that actually matters: should you buy the MX Master 3S mouse, the MX Keys S keyboard, or both?
The honest answer isn’t as simple as “get the bundle.” Your workflow, your pain points, and the devices you’re juggling every day all factor in. Maybe your current keyboard is perfectly fine and you just need a mouse that can keep up with your brain. Or maybe your wrists are crying out for a proper typing experience while your old mouse sits there, still fine.
This guide breaks it all down — side by side, feature by feature — so you can make the smartest call for your home office setup (and your wallet).
Quick Answer
Upgrading your mouse first? → Get the MX Master 3S. It’s one of the most capable productivity mice ever made.
Upgrading your keyboard first? → Get the MX Keys S. The typing feel and smart backlighting are genuinely hard to go back from.
Want the full premium setup? → Get both. They share the same multi-device pairing system (Easy-Switch), the same receiver if you prefer USB, and the same Logitech Options+ software. Together, they form a seamless, distraction-free workstation.
Comparison Table
| Feature | MX Master 3S | MX Keys S |
|---|---|---|
| Type | Wireless Mouse | Wireless Keyboard |
| Connection | Bluetooth / USB-C Logi Bolt | Bluetooth / USB-C Logi Bolt |
| Multi-Device Pairing | Up to 3 devices | Up to 3 devices |
| Battery Life | Up to 70 days | Up to 10 days (backlight off: 36 days) |
| Charging | USB-C | USB-C |
| Scroll Wheel | MagSpeed Electromagnetic | N/A |
| Backlighting | No | Smart per-key backlight |
| Key Feel | N/A | Low-profile spherical keys |
| OS Compatibility | Windows, macOS, Linux, iPadOS | Windows, macOS, Linux, iOS, Android |
| Software | Logitech Options+ | Logitech Options+ |
| Customization | 7 buttons, gesture control | Customizable Fn keys, Smart Actions |
| Best For | Power users, heavy scrollers | Typists, multi-device switchers |
Deep Dive: Logitech MX Master 3S
Scrolling That Changes Everything
If you’ve never used MagSpeed electromagnetic scrolling, prepare to be quietly amazed. The MX Master 3S can scroll through 1,000 lines in a single second — no mechanical noise, no resistance fighting you on long documents. It shifts automatically between precise click-to-click scrolling and free-spinning mode depending on how fast you push the wheel. For spreadsheets, long codebases, or design files with a hundred layers, this alone is worth the price of admission.
Built for Your Right Hand
The MX Master 3S is shaped around the natural curve of your right hand. The thumb rest, side scroll wheel, and contoured arch mean your hand sits in a relaxed, ergonomic position all day — a genuine relief if you’re putting in eight-plus-hour sessions. It’s a noticeably heavier mouse than budget options, but that weight actually contributes to a sense of precision and control.
70 Days. Yes, Really.
Battery anxiety is a real thing. The MX Master 3S eliminates it with up to 70 days of use on a single charge via USB-C. Even if you forget to charge it for weeks at a time, you’re not going to find yourself reaching for that old corded mouse out of desperation.
Customization Goes Deep
Seven programmable buttons plus a gesture button under the thumb give you a level of shortcut power that genuinely reshapes how you work. With Logitech Options+, you can assign different actions per app — send a Slack message with a gesture in one app, trigger a screenshot in another. The horizontal scroll wheel on the side is underrated for wide spreadsheets and video timelines.
Multi-Device Pairing
The Easy-Switch button on the bottom lets you hop between up to three paired devices instantly. If you work across a MacBook, a Windows desktop, and an iPad, the MX Master 3S handles all three without re-pairing. You can use the USB-C Logi Bolt receiver for more reliable connectivity, or go fully Bluetooth.
Deep Dive: Logitech MX Keys S
The Typing Feel That Converts People
The MX Keys S uses low-profile spherical keys — each key has a slight concave dish shaped to meet your fingertip right at center. It’s a subtle thing, but after a few days of use, going back to a flat keyboard feels like typing on a table. The key travel is short but tactile, with a satisfying feedback that doesn’t require any force. Fast typists tend to fall hard for this keyboard.
Smart Backlighting That Stays Out of Your Way
The per-key backlighting on the MX Keys S is proximity-activated — it wakes up when your hands approach and dims when you step away. It’s not a gimmick. In a dim office at night, it’s genuinely useful without being distracting. You can control brightness and set your preferred behavior through Options+.
Battery Life Worth Noting
With backlighting on, expect around 10 days per charge. With backlighting off, that jumps to a solid 36 days. For most professionals, charging weekly with a USB-C cable is a minimal ask. The keyboard charges quickly, and the battery indicator in Options+ gives you a heads-up before you hit zero.
Three Devices, One Keyboard
Like the MX Master 3S, the MX Keys S pairs to up to three devices simultaneously via Easy-Switch buttons (F1–F3). Switching between your work laptop, personal computer, and iPad takes a single keypress. For anyone who lives across multiple machines, this is a workflow upgrade that’s hard to quantify.
OS-Specific Key Layouts
One genuinely thoughtful feature: Logitech designed the MX Keys S to automatically adapt key labels and shortcuts based on your operating system. Whether you’re on Windows (Ctrl, Alt, Windows key) or macOS (Command, Option), the layout and shortcuts behave as expected. It’s the kind of detail that removes a small daily friction you didn’t know you had.
Who Should Buy the MX Master 3S?
The MX Master 3S is the right choice if:
- You do heavy scrolling through long documents, code, spreadsheets, or creative files
- You work across multiple devices (two or three machines daily)
- You want serious shortcut and gesture customization baked into your mouse
- You prioritize ergonomics and hand comfort during long sessions
- Your current keyboard is already solid and your mouse is the weak link
Who Should Buy the MX Keys S?
The MX Keys S is the right choice if:
- You’re a high-volume typist — writing, coding, email — and typing feel matters to you
- You want a low-profile keyboard that works beautifully on a clean desk
- You manage multiple devices and want the fastest possible device-switching
- Your current mouse is already a workhorse and your keyboard is holding you back
- You want smart backlighting that adjusts intelligently to your environment
Bundle Recommendation: Buy Both Together
Here’s the case for going all-in: the MX Master 3S and MX Keys S are designed as a system.
They pair to the same Logi Bolt USB receiver (one dongle for two peripherals). They share the same Easy-Switch multi-device logic, so switching your entire setup from your Mac to your PC is two button presses — one on the mouse, one on the keyboard. They live in the same Logitech Options+ software interface, meaning you can manage macros, customization, and battery for both in one place.
Aesthetically, they’re a matched pair — the same matte finish, the same minimal footprint. If you’re investing in a home office setup you’ll use for the next three to five years, buying both now versus upgrading piecemeal later usually works out cheaper and gives you a more cohesive experience from day one.
Recommended for: Remote professionals, developers, writers, designers, or anyone who spends the majority of their workday at a desk and wants their peripherals to disappear into the workflow instead of fighting against it.
Final Verdict
The Logitech MX Master 3S and MX Keys S aren’t competing products — they’re complementary ones. Logitech built them to work together, and that shows in how seamlessly they integrate.
If you can only choose one, let your biggest pain point decide: bad mouse or bad keyboard? Fix that first. But if you’re ready to upgrade your entire input setup and you want gear that will still feel premium in five years, the bundle is the answer.
For the money, these remain two of the best-performing, most thoughtfully designed peripherals for serious home office work — and HomeOfficePick recommends them without hesitation.
Check current prices and availability for the MX Master 3S and MX Keys S — and look for bundle deals that pair both at a discount.
Affiliate Disclosure
HomeOfficePick participates in affiliate marketing programs. Some links on this page are affiliate links, which means we may earn a small commission at no additional cost to you if you click through and make a purchase. We only recommend products we’ve researched and believe add genuine value to your home office setup. Our editorial opinions are our own and are not influenced by affiliate relationships.