Description 1. [BEST COMPATIBLE BLUETOOTH 4.0 CHIP]: Compatible with over 99.8% of Bluetooth devices. This Bluetooth mouse is suitable for all laptops with Bluetooth function or iPads/iPhones with iOS13 or above. 2. [AUTO ENERGY-SAVING SLEEPING MODE]: Features Li-polymer batteries with a high cycle life. The Auto Switch Off function helps save energy by automatically switching off the mouse when your PC is turned off or the receiver is disconnected. If the mouse is not used for eight minutes, it enters sleeping mode; press any button to wake it up. 3. [BUILT-IN BATTERY]: Built-in battery for easy charging via micro USB cable, eliminating the need for extra AAA batteries. Please ensure the mouse power switch is in the ON position when charging. 4. [ERGONOMIC DESIGN]: Boasts a superior surface coating for a skin-like touch. The user-friendly design provides all-day comfort for work and entertainment. Its portable and pocket-sized design is perfect for travel, and the mute design eliminates annoying clicks. 5. [Silent mode button silent] Whether you use it in a dormitory, library, or office, don't worry about disturbing others.