Logitech Lift Vertical 1000DPI 2.4GHz Ergonomic Wireless Bluetooth Dual Mode Mouse 1. Specially designed for small and medium hands, experience a comfortable feel. 2. Natural support, comfortable grip. Features sweat-resistant rubber palm rests with comfortable thumb rests for a soft feel. 3. 57 degree inclination ergonomic design. 4. Low-noise key clicks and quiet and smooth tumbling. 5. Precise and fast scrolling modes. 6. Logi options+ software, 4 buttons can be customized. Different settings can even be customized for different applications. 7. Easy-switch, can connect 3 devices at the same time, switch freely, and transfer across devices. 8. Specification: Keys: 6 Battery: AAx1(not included) Battery life: up to 24 months Connection Type: LOGI BOLT USB Receiver, Bluetooth Wireless range: about 10 meters Software Support: Supported by logi options+ compatible with MacOS 10.15 or above, Windows 1011 or above. System Requirements: Windows1011, MacOS 10.15 or above, iPad 14 or above, Chrome OS, Linux, Android 8 or above