Sensor Technology:Optical Sensor Resolution:1600 dpi Battery Life:3 months Battery Type:1AA Buttons:3 Wireless Distance:3 months Wireless System:2.4GHz Connection Type:Wireless (USB Receiver) What's in the box 1.W603 2.USB Receiver 3.1xAA Battery 4.Manual Book Box size:7*4.4*10.9cm N.W: 45g G.W: 93g Carton size:47.5*38*25cm N.W: 9.3kg G.W: 9.9kg Qty/ctn: 100pcs 1×AA battery included delivers up to 3 months runtime ,Usage duration varies based on habits Symmetrical shape with comfortable curves reduces hand fatigue during prolonged use. Suitable for left/right-handed users Optical sensor with 3 adjustable DPI presets (1000/1200/1600) ensures smooth cursor control Nano USB receiver provides stable 2.4GHz wireless (10m range). Stores inside mouse when not in use.