The Ergo M575 Trackball mouse from Logitech reduces hand movements when working, meaning you can continue comfortably for hours. Other features: - Number of keys: 5 (left/right click, back/forward, scroll wheel with middle click) - Battery type: 1 x AA battery (included) - Battery life with USB receiver: Up to 18 months (may vary based on use and computing conditions) - Battery life with Bluetooth: Up to 20 months (may vary based on use and computing conditions) - 2.4 GHz USB receiver - Bluetooth Low Energy technology - Wireless range: 10 m System requirements: Logi Bolt USB receiver Windows 10 or later macOS 10.14 or later LinuxR5 Chrome OS.5 Wireless Bluetooth Low Energy technology Windows 10 or later macOS 10.15 or later Linux5 Chrome OS5 iPadOS 13.4 or later Includes: - ERGO M575 Wireless Trackball - 1 AA battery - Quick start guide - Logi Bolt USB receiver