Overview

  • Logitech’s first mouse with palm cushion
    The built-in palm cushion on the contoured mouse gives you a comfy spot for your hand making long hours of work feel a little more comfortable
  • Feel a natural, confident fit
    Shaped for right-handed users with most hand sizes, this comfortable mouse with cozy side grips helps you stay relaxed and in control, hour after hour
  • Scroll faster, stay focused
    Scroll line by line or fly through pages with SmartWheel; quiet clicks reduce noise in shared or home offices
  • Make it yours
    Customizable buttons via Logi Options+ adapt to your tasks and help you do more; in the app you can boost productivity across apps, adjust DPI levels and personalize your workflow.
  • Simple connections
    Connect this multi-device mouse with Bluetooth pairing, then swap up to 3 devices instantly with Easy-Switch—just a tap, no dongle needed; perfect for multitasking
  • Works on nearly any platform
    Compatible with Windows, macOS, Chrome OS, Linux, ipadOS and Android; one mouse for all your devices and desk setups
  • Designed for sustainability
    The plastic parts of Signature Comfort M840 L are made with a minimum of 50% post-consumer recycled plastic

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Specifications

Capacity & configuration

Mouse Type
Standard
Lighting Type
None
Connection Type
Wireless

Dimensions & weight

Product Name
Signature Comfort Plus M850 L Wireless Bluetooth Mouse with Silent Clicks and Customizable Buttons
Adjustable Weight
No
Product Height
1.74 inches
Product Length
4.8 inches
Product Width
2.93 inches
Product Weight
107.9 grams

Features

Color
Black, Off-white
Brand
Logitech
Mouse Operation
Button(s)
Mouse Grip Style
Ergonomic
Handedness
Right-handed
Tracking Method
Optical
Maximum Sensitivity
4000 dots per inch
Minimum Sensitivity
400 dots per inch
Number of Buttons (Total)
6
Wireless Connectivity
Bluetooth
Operating System Compatibility
Windows
On/Off Switch
Yes
Rechargeable Battery (Mouse)
No
Battery Size
AA
Number of Batteries Required
1
Batteries Included
Yes
Mouse Pad Included
No
System Requirements
Via Bluetooth Low Energy Wireless Technology, Windows 10, 11 or later, macOS 12 or later, Linux, Chrome OS, iPadOS 15 or later, Android OS 12 or later
UPC
097855209948

Power & warranty

Model Number
910-007711
Mouse Power Source
Battery-powered
Warranty - Parts
1 year limited
Warranty - Labor
None

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

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Customer reviews

Write a review
ThomasMOct 23, 2026 · Verified purchase ★★★★★

Very quiet - I got it for college lectures because it was silent and does the job while having long battery life

JAMESBOct 23, 2026 · Verified purchase ★★★★★

Solid & reliable! - Easy to connect Bluetooth mouse that stays connected and works very reliably, on top of having every function an everyday user needs

NoelTenayucaOct 22, 2026 · Verified purchase ★★★★★

Logitech Comfort Plus M850 is the way to go - I must say Logitech never goes wrong when it comes to beating the best brandnames out there . this mouse here is works with authority and no limits on how fast you can work with this type of comfort at the palm of your hand

FantasyFan1990Oct 14, 2026 · Verified purchase ★★★★★

Really nice mouse - It's very comfort and smooth, as well it responds easily to your clicks and movements.

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat