The Logitech Signature Comfort M840 L is designed for comfortable everyday computing and productivity. Its contoured, right-handed shape and textured side grips support a natural hand position, while Bluetooth connectivity makes it easy to connect to compatible computers and mobile devices. With quiet clicks, SmartWheel scrolling, and customizable controls, it is a practical choice for home and office workstations.
Contoured Design for Comfortable Control
The M840 L features a sculpted shape designed for right-handed users. Contoured side grips and a thumb rest help provide a secure, comfortable hold during everyday navigation. Its Off-White finish complements contemporary desk setups and professional workspaces.
SmartWheel Scrolling and Quiet Clicks
SmartWheel scrolling supports precise line-by-line navigation as well as faster movement through lengthy documents and web pages. Quiet-click technology reduces clicking noise, helping maintain a quieter working environment.
Bluetooth Connectivity and Easy-Switch
Pair the mouse with compatible devices through Bluetooth. Easy-Switch allows you to pair and switch between up to three devices, making it convenient to move between computers and compatible tablets without repeatedly pairing the mouse.
Adjustable Optical Tracking
The optical sensor supports adjustable tracking sensitivity from 400 to 4000 DPI. Use Logitech Options+ on supported Windows and macOS systems to customize supported buttons and available pointer settings to suit your workflow.
Key Features
- Contoured, right-handed design with a thumb rest and comfortable side grips.
- Bluetooth wireless connectivity with Easy-Switch support for up to three devices.
- Optical tracking with adjustable sensitivity from 400 to 4000 DPI.
- SmartWheel scrolling and quiet-click buttons for comfortable everyday use.
- One included AA battery with a rated battery life of up to 24 months, depending on usage.
Compatibility and Customization
The mouse works with compatible devices running Windows, macOS, ChromeOS, Linux, iPadOS, and Android. Logitech Options+ provides customization features on supported Windows and macOS systems. Specific functions may vary according to the connected device and operating system.
Recommended Applications
- Office productivity and everyday computer navigation.
- Home-office and business workstation setups.
- Working across multiple compatible computers and tablets.
- Quiet work environments where reduced clicking noise is useful.
DC Supplies Product Note
This listing identifies the product by Logitech part number 910-007713. Check your device's Bluetooth compatibility and operating-system requirements before use.
Technical Specifications
| Brand | Logitech |
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| Part Number / MPN | 910-007713 |
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| Product Type | Wireless Mouse |
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| Product Line | Signature Comfort |
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| Model | M840 L |
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| Color | Off-White |
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| Connectivity | Bluetooth Low Energy |
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| Bluetooth Version | Bluetooth 5.2 LE |
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| Tracking Technology | Optical |
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| Tracking Resolution | 400–4000 DPI |
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| Buttons | 6 customizable buttons, including the scroll-wheel control |
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| Scroll Technology | SmartWheel |
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| Ergonomic Design | Right-handed |
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| Grip Features | Contoured shape, thumb rest, side grips |
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| Click Technology | Quiet clicks |
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| Multi-Device Support | Up to 3 devices |
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| Wireless Range | Up to approximately 10 m (33 ft), depending on environment |
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| Battery Type | 1 x AA |
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| Battery Included | Yes |
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| Battery Life | Up to 24 months, depending on usage and conditions |
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| Height | 121.8 mm |
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| Width | 74.3 mm |
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| Depth | 43.2 mm |
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| Weight | Approximately 104.6 g |
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| Plastic Recycled Content | At least 50% post-consumer recycled plastic in plastic parts |
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| UPC | 097855209931 |
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| Compatible Operating Systems | Windows, macOS, ChromeOS, Linux, iPadOS, Android |
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| Customization Software | Logitech Options+ on supported systems |
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| Package Contents | Mouse, 1 x AA battery, documentation |
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Frequently Asked Questions
1. How does the Logitech M840 L connect?
The mouse connects wirelessly through Bluetooth to compatible computers and mobile devices. A dedicated USB receiver is not required for Bluetooth pairing.
2. Can I switch between multiple devices?
Yes. Easy-Switch supports pairing with up to three compatible devices and switching between them.
3. Is the M840 L suitable for left-handed users?
The contoured shape and thumb-rest design are intended primarily for right-handed users.
4. Can I adjust the pointer sensitivity?
Yes. The optical sensor supports tracking sensitivity from 400 to 4000 DPI. Available adjustment options depend on your device and supported software.
5. What battery does the mouse use?
The mouse uses one AA battery, which is included. Battery life is rated for up to 24 months under specified usage conditions, although actual results vary.
6. Can I customize its buttons?
Yes. Logitech Options+ supports button customization on compatible Windows and macOS systems.
