Logitech Signature Comfort M840 L
Signature Comfort M840 L is shaped for right hands with cozy side grips and a thumb support area for confident, all-day control. Scroll line by line or fly through pages with SmartWheel, and work with quiet clicks in shared or hybrid spaces. Pair across devices over Bluetooth Low Energy, customise buttons in Logi Options+, and run for up to 24 months on one AA battery. Unlike Signature Comfort Plus M850 L, this model does not include a built-in palm cushion. Compatible with Logi Bolt USB receivers (not included). 1-year limited hardware warranty.
Options differ by scan range, keypad, memory and connectivity — read the note under your selection, or use How to choose below.
What this config means
Primary listing colour · Bluetooth edition · Bolt compatible (receiver not included)
SKU 910-007735
Business pricing
Request a quote for firm INR pricing · SKU: 910-007735
Free standard shipping across India on fulfilled hardware orders. Quote responses within 1 business day.
Specifications19 technical details
Built for comfortable control
A natural fit in your hand
Shaped for right hands and built with cozy side grips, Signature Comfort M840 L helps you stay comfortable and in control, hour after hour.
Gentle hold, comfy control
The sculpted shape fits naturally in your hand. The thumb rest and extended rubber side grip give you confidence and control.
Effortless scrolling, quiet clicks
Scroll line by line or fly through pages with SmartWheel — all with quiet clicks for a calm, focused workflow.
Make it yours
Personalise buttons and shortcuts with the Logi Options+ app so the mouse works the way you do.
Datasheets & resources
Official Logitech documentation for Logitech Signature Comfort M840 L.
Frequently asked questions
What is the difference between Signature Comfort Plus M850 L and Signature Comfort M840 L?
Signature Comfort Plus M850 L features a built-in palm cushion, while Signature Comfort M840 L does not.
What is new about the comfort design?
The mouse has a sculpted right-hand shape, rubber side grips and a thumb support area — shaped to fit your hand naturally, with more precision from the grips and added thumb comfort.
Is it suitable for long hours of computer work?
Yes. Comfort features and quieter operation are designed to improve comfort during extended use.
Is this only for home offices?
No. It is designed for home, office and hybrid environments — especially shared or flexible workspaces where quieter operation and comfort matter.
Does it support multiple devices?
Yes. Multi-device pairing and Easy-Switch support connecting and switching between up to five devices.
Does it work across operating systems?
Yes. It supports major operating systems including Windows, macOS, ChromeOS and others. Basic functions work without software outside Windows and macOS.
Can users customise buttons?
Yes. Through the Logi Options+ app, users can customise buttons and action shortcuts.
Is it quieter than standard mice?
Yes. It is designed with silent clicking to reduce distraction in shared and hybrid work environments.
What is the battery life?
Up to 24 months. Actual battery life varies by usage. One AA battery is included; no charging cable is required.
Does the M840 L include a Logi Bolt receiver?
No. It connects over Bluetooth Low Energy and is compatible with a Logi Bolt USB receiver if you already have one or order one separately.
Which colours are available?
Graphite Bluetooth (910-007735) and Off White Bluetooth (910-007736). Specify the finish when you request a quote.
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