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Logitech

Logitech Signature Comfort M840 L Wireless Mouse, Bluetooth Mouse with Silent Clicks, SmartWheel, Customizable Buttons, Black

$41.85
2,195 availableas of 09/19/2026

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Should arrive by Wed, Sep 30 with free ground shipping

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Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

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Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

Discover Signature Comfort M840 L, created for all-day comfort with a natural shape for right hands and cozy side grips. Enjoy smooth SmartWheel scrolling and quiet clicks-making every navigation peaceful and precise. Effortlessly switch between up to three devices with Bluetooth and Easy-Switch, with no dongle required. Connect wirelessly across Windows, macOS, Chrome OS, Linux, iPadOS, and Android for a seamless working experience. With up to 24 months of battery life, you can work, create, and stay connected with fewer interruptions and more focus.

Technical specifications

General Information

Manufacturer Logitech
Manufacturer Part Number 910-007714
Manufacturer Website Address http://www.logitech.com
Brand Name Logitech
Product Line Signature Comfort
Product Model M840 L
Product Name Signature Comfort M840 L Mouse
Product Type Mouse

Pointing Device

Pointing Device Connectivity Technology Wireless
Pointing Device Wireless Technology Bluetooth/Radio Frequency
Wireless Operating Frequency 2.40 GHz
Movement Detection Optical
Movement Resolution (dpi) 4000
Total Number of Buttons 6
Scroller Type Scroll Wheel
Pointing Device Features SilentComfort GripCustomizable KeysContourSide GripQuiet ClicksFast ScrollingAdjustable DPIEasy-Switch
Ergonomic Fit Right-handed
Wireless Receiver Interface USB

Interfaces/Ports

Pointing Device Host Interface USB

Battery Information

Number of Batteries Supported 1
Battery Size Supported AA
Battery Included Yes
Maximum Battery Life 2 Year

Power Description

Power Source Batteries

Physical Characteristics

Color Family Black
Product Color Black
Product Material Recycled Plastic
Height 4.8"
Width 2.9"
Depth 1.7"
Weight (Approximate) 3.63 oz

Miscellaneous

Package Contents
  • Signature Comfort M840 L Mouse
  • 1 x AA Battery
  • User Documentation
Operating System Compatibility LinuxWindows 10ChromeOSWindows 11iPadOS 15Android 12Mac OS X 12.0 Monterey
Platform Supported MacPC
Post-consumer-waste% 50%

Warranty

Limited Warranty 1 Year

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Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

Need to send it back? Start a return online with a Request RMA and our team will take care of you. Keep the original packaging. Items must be returned in the condition received.

Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.