Rosewill 2.4GHz Wireless Optical Mouse with Nano Receiver (RIMO-12001) Works at full 360 degrees up to 10 meters better range and less interference with 2.4GHz RF technology 500, 1000, 1500 and 1750 DPI Power saving technology with automatic standby mode Unique and ergonomic shape for comfort Just plug the nano receiver in and forget about it, without any worry about protrusion or snap Free you from cable clutter with full 360 degrees and up to 10 meters operation range and less interference