Description
Logitech Signature Comfort M840 L is a right-handed wireless mouse designed for extended everyday use, combining ergonomic support with responsive control. A contoured shape, thumb rest, and rubber side grips help reduce hand fatigue while the silent click design keeps noise to a minimum for shared workspaces. The SmartWheel and realtime sensitivity switching make scrolling and pointer adjustment smooth and efficient, while four programmable buttons and a DPI switch provide quick access to customized shortcuts and precision modes.
Wireless Bluetooth 5.2 LE connectivity and Easy-Switch technology allow pairing with up to five devices and reliable operation up to 10 m, and the AA alkaline battery offers simple, replaceable power management with an LED battery indicator and on/off switch. Built with durable components rated for millions of clicks and made partly from recycled post-consumer plastic, this mouse balances practical sustainability with long-term reliability for everyday computing needs.
- Ergonomic right-handed shape with thumb rest and rubber side grips
- Versatile wireless connectivity for up to five devices with Bluetooth 5.2 LE
- Ergonomic right-handed design
A contoured profile with a thumb rest and rubber side grips provides comfortable support for extended use and helps reduce hand fatigue. - Durable customizable controls
Six buttons including four programmable controls, a DPI switch, and a SmartWheel enable personalized shortcuts and reliable input that is rated for millions of clicks.
Main Specifications
Product Description | Logitech Signature Comfort M840 L – mouse – Bluetooth 5.2 LE – off-white |
Device Type | Mouse |
Connectivity Technology | Wireless – Bluetooth 5.2 LE |
Colour | Off-white |
Orientation | Right-handed |
Dimensions (WxDxH) | 7.43 cm x 12.18 cm x 4.32 cm |
Weight | 104.6 g |
Movement Detection Technology | Optical |
Buttons Qty | 6 |
Movement Resolution | 4000 dpi |
Performance | Realtime sensitivity switching 400 – 4000 dpi |
Features | SmartWheel, customisable buttons, DPI switch button, 4 programmable buttons, 5 devices simultaneous connectivity, Bluetooth Low Energy Compatible, silent click, ARM 32-bit processor, Easy-Switch technology, 5 million clicks, rubber side grips, thumb rest, LED battery indicator, on/off switch, Bluetooth connect button |
Battery | AA type |
OS Required | Windows 10 / 11 or later, Apple MacOS 12.0 or later, Linux, Google Chrome OS, Android 12 or later, Apple iPadOS 15 or later |
Product Recycled Content | 49 % – made of recycled post-consumer plastic |
Extended Specifications
General
Device Type | Mouse |
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Orientation | Right-handed |
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Width | 7.43 cm |
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Depth | 12.18 cm |
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Height | 4.32 cm |
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Weight | 104.6 g |
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Product Material | Plastic |
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Colour | Off-white |
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Input Device
Connectivity Technology | Wireless |
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Interface | Bluetooth 5.2 LE |
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Max Operating Distance | Up to 10 m |
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Movement Detection Technology | Optical |
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Buttons Qty | 6 |
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Movement Resolution | 4000 dpi |
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Performance | Realtime sensitivity switching 400 – 4000 dpi |
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Features | SmartWheel, customisable buttons, DPI switch button, 4 programmable buttons, 5 devices simultaneous connectivity, Bluetooth Low Energy Compatible, silent click, ARM 32-bit processor, Easy-Switch technology, 5 million clicks, rubber side grips, thumb rest, LED battery indicator, on/off switch, Bluetooth connect button |
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Miscellaneous
Compliant Standards | Works With Chromebook (WWCB) certified, Engineered for Intel Evo, FSC |
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Sustainability Information
Product Recycled Content | 49 % – made of recycled post-consumer plastic |
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Battery
Type | AA type |
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Technology | Alkaline |
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Run Time (Up To) | 24 months |
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Software / System Requirements
Software Included | Logi Options + |
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OS Required | Windows 10 / 11 or later, Apple MacOS 12.0 or later, Linux, Google Chrome OS, Android 12 or later, Apple iPadOS 15 or later |
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