characteristic:Use the latest 5.2 Bluetooth communication protocol (compatible with device 1.0 2.0 3.0 4.0) (Note: incompatible with USB Bluetooth receiver.)Support Win7 Win8 Mac IAPD Android XP WP and other devices.1. Receiver free Bluetooth wireless technology (receiver free mouse)2. Ergonomic right handed mouse, ultra-thin shape, in line with modern people's preferences and ergonomics3. Effective distance is greater than 10m4. Support all Bluetooth compatible PC systems or laptops5. Easily adapt and connect the computer without reconnecting after the first connection6. Color: Blacksix Power supply: 2 AAA batteries (excluding)