| Model |
Logitech Signature Comfort M840 L |
| Part Number |
910-007735 (Graphite Bluetooth) |
| Height |
121.8mm |
| Width |
74.3mm |
| Depth |
43.2mm |
| Weight (with Battery) |
104.6g |
| Weight (without Battery) |
79.6g |
| Sensor Technology |
Pluto ONE (Logitech Advanced Optical) |
| Nominal Resolution |
1000 DPI |
| DPI Range |
400–4000 DPI (adjustable in 100 DPI increments) |
| Number of Buttons |
6 (Left Click, Right Click, Middle Click, Forward, Back, DPI Button) |
| Programmable Buttons |
4 (Middle Click, Forward, Back, DPI Button) |
| Gesture Button |
No |
| Scroll Wheel |
SmartWheel |
| Horizontal Scrolling |
Virtual |
| Thumb Wheel |
No |
| Customisation Software |
Logi Options+, Logi Tune |
| Battery Type |
1 × AA Alkaline |
| Battery Life |
Up to 24 Months |
| Battery Life (Bluetooth) |
Up to 24 Months |
| Battery Life (Logi Bolt Receiver) |
Up to 24 Months |
| Connection Type |
Bluetooth Low Energy |
| Wireless Range |
Up to 10m |
| Multi-Device Pairing |
Up to 5 Devices |
| Logitech Unifying Support |
No |
| Logi Bolt Support |
Compatible with Logi Bolt USB Receiver (sold separately); not compatible with Logitech Unifying receivers |
| Compatibility |
Windows 10/11 or later, macOS 12 or later, Linux*, ChromeOS*, iPadOS 15 or later, Android™ 12 or later |
| Certification |
WWCB, Engineered for Intel® Evo™ Laptops |
| Warranty |
1-Ye |
