Product Description Color: white, blackTyrant gold, silver, space gray, rose gold 1. [BEST COMPATIBLE BLUETOOTH 4.0 CHIP]: Compatible with more than 99.8% of Bluetooth devices. This Bluetooth mouse is suitable for all laptops with Bluetooth function or iPad iPhone with iOS13 or higher. 2. [AUTO ENERGY-SAVINGSLEEPING MODE]: Li-polymer batteries, long service life. The auto-off function helps you save energy as your Bluetooth mouse turns off when your computer is turned off or the receiver is disconnected. If you don't use the mouse for eight minutes, it will enter sleep mode; you can press any button to wake it up. 3. [BUILT-IN BATTERY]: Built-in battery, easy to charge with a micro-USB cable, no need for an extra AAA battery. Please keep the mouse power switch in the "ON" position while charging. 4. [ERGONOMIC DESIGN] Good surface coating technology gives you a skin-like feel. User-friendly design provides all-day comfort for work and entertainment, portable and pocket-sized perfect for travel. Silent design keeps annoying clicks away. 5. [SILENT MODE BUTTON QUIET] Whether you use it in a dorm, library, or office, don't worry about affecting others.