1.Version 1.1 or 2.0 2.advanced anti-interference,connection distance of 6-10m 3.high-resolution 1000 DPI or 1600DPI 1.Version 1.1 or 2.02.advanced anti-interference,connection distance of 6-10m3.high-resolution 1000 DPI or 1600DPI4.Bulit in USB ultra fine receiver,plug and play,no need to code,intelligent connection5.3.0V or 1.5V6.Red or black7Highly quality8.2pcs of AAA alkaline battery can ...