Detailed Product Description ST-W925 Laser Game Wireless Mouse2.4GHz Wireless Laser Mouse with 6 button 1. Agilent optical sensor: Resolution, 800dpi or 1600 dpi, adjustable 2. Digital radio controlled (2.4 GHz frequency) 3. With Forwards and Backwards keys 4. Working range: 8-15m 5. Only one AA battery needed. Automatically battery saving 6. The mini receiver can be inserted into the mouse body