Logitech MX Mechanical Mini Wireless Bluetooth Dual Mode Keyboard with Logi Bolt USB Receiver(Green Axis)1. Easy switch: connect up to 3 devices and switch between them 2. Hand proximity sensor activated backlighting 3. Auto adjust ambient light sensor 4. 10m wireless range 2Wireless range may vary depending on operating environment and computer setup. 5. USB C rechargeable: up to 15 days or up to 10 months with backlighting off 3Battery life may vary based on user and computing conditions 6. On Off power switch 7. Caps Lock and Battery indication 8.