Product Description Color: White, BlackTyrant Gold, Silver, Space Gray, Rose Gold 1. [BEST COMPATIBLE BLUETOOTH 4.0 CHIP]: Compatible with more than 99.8 percent bluetooth devices. This Bluetooth mouse is suitable for all laptops with Bluetooth function or iPad iPhone with iOS13 or above 2. [AUTO ENERGY-SAVINGSLEEPING MODE]: Li-polymer batteries, long lifespan. The auto power off feature helps you save energy as your Bluetooth mouse will turn off when your PC is turned off or the receiver is disconnected. If you don't use the mouse for eight minutes, it goes into sleep mode. You can press any key to weaken it. 3. [BUILT-IN BATTERY]: Built-in rechargeable battery, easy to charge via Micro USB cable, no longer need extra AAA battery. Please keep the mouse power switch "ON" when charging. 4. [ERGONOMIC DESIGN]: Good surface coating technology with a skin-like touch feeling. The user-friendly design provides all-day convenience for work and entertainment, and it's portable and pocket-sized perfect for on the go. The mute design keeps annoying clicks away. 5. [Silent Mode Button Silent]: Whether you use it in a dormitory, library or office, don't worry about affecting others.