Lenovo thinkplus Bluetooth 4.0 Portable Wireless Bluetooth Mouse (Black)

1. Ergonomic design, comfortable grip 2. Three-speed DPI, laser engine is more intelligent 3. Energy-saving core, more power saving 4. Classic skin coating, no fingerprints or sweat, no traces 5. Operating system: win 8 and above 6. Dimensions: 107.2×58.6x28mm 7. Packing list: mouse, warranty certificate, instruction manual, 2 AAA batteries