ERGONOMIC DESIGN - Vertical mouse that promotes a handshake position while using the mouse for more comfort for prolonged use 3-IN-ONE CONNECTIVITY -Portable without cable-hassle, equipped with three wireless connection methods (wireless 2.4 G via USB-A, via USB-C, and Bluetooth), can be connected to three different devices that support the listed wireless connections RECHARGEABLE - Built-in, high-quality rechargeable Li-Po 300mAh battery, can last up to 15 days (based on 4-hour use per day after a single full charge; the laptop wireless mouse will enter into sleep mode automatically after inactivity to save power, and move the mouse to activate it back FOR PRODUCTIVITY - High-quality optical sensor; switch between DPI levels 1000 / 1600 / 2400 to adjust mouse responsiveness depending on your activities COMPATIBILITY - Windows OS, Linux Ubuntu 16.04, Chromebook, iPadOS, Android, Fire Tablet; Partial compatibility with macOS (forward and backwards buttons are not availabl