Rapoo 3920P 5.8Ghz High Speed Wireless Mouse 1000DPI Optical Laser Mice for PC Laptop Black Adjustable 800/1600 DPI high-definition tracking engine Reliable 5GHz wireless connection, perfect for anti-jamming Powerful laser engine makes 3920P move freely on almost all surfaces. Nano USB Receiver: no installation software or drivers required, plug and play Powered by 2 x AA alkaline batteries, you can use this mouse with only one battery