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Off-white wireless mouse with contoured right-hand shape and matte finish

Logitech

Logitech Signature Comfort M840 L mouse Off-white

SKU CH-DRZQ-S0RX0

A full-size wireless mouse with silent clicks, a smart scroll wheel and 4000 dpi optical tracking for PC and Mac

  • Product typeBluetooth Wireless
  • Comfortable all-day use with contoured shape and soft thumb rest
  • Silent clicks keep noise low in shared spaces
  • SmartWheel shifts between ratchet and free-spin scrolling
  • Connects via Bluetooth or 2.4 GHz USB receiver
  • 4000 dpi optical sensor tracks precisely on most surfaces

Signature Comfort M840 L wireless mouse

The Signature Comfort M840 L is a full-size wireless mouse designed for office professionals and home users who spend long hours at a computer. Its contoured shape supports the palm naturally, while silent clicks keep shared spaces quiet. Connectivity works over Bluetooth or the included 2.40 GHz USB receiver for broad device support.

Right fit versus other needs

This model suits anyone who wants a comfortable, quiet pointer for daily productivity across Windows and macOS. Buyers who need a compact travel mouse, a high-button-count layout for complex macros, or a rechargeable battery system should look at something else.

Optical sensor at 4000 dpi

The optical sensor is rated at 4000 dpi, providing precise tracking on most desk surfaces without a pad. This sensitivity level determines how far the cursor moves per hand motion and is the key figure to match against your workflow requirements.

How it compares

Measured against everything we stock in Wireless & Ergonomic Mice, at today’s prices. Recalculated every night.

Price $40.99
Pricier than about 69% of the 403 comparable items (median $25.99).

Specifications

Product
Brand nameLogitech
Product typeBluetooth Wireless

Questions about this item

How many programmable buttons does the M840 L have for repetitive tasks?

The mouse includes customizable buttons that can be assigned to shortcuts or macros through Logitech Options software.

Does the SmartWheel shift modes automatically when I scroll faster?

Yes, the SmartWheel switches between ratcheted and free-spin scrolling depending on scroll speed.

What type of USB port is needed for the 2.4 GHz receiver?

A standard USB-A port is required to plug in the included 2.4 GHz wireless receiver.

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