Sensor Technology:Optical Sensor Resolution:1000-1200-1600 dpi Battery Life:Up to 3 Months Battery Type:1*AA Buttons:4 Wireless Distance:Max.10 Meters Wireless System:2.4GHz Connection Type:Wireless (USB Receiver) What's in the box 1. GO W609 Mouse 2.Manual Book 3.1*AA Battery 4.USB Receiver Box size:4.2*16.3*20.1cm N.W: 54g G.W: 95g Carton size:45*42*35cm N.W: 9.4kg G.W: 10.2kg Qty/ctn:100pcs 3-Month Battery Life 1×AA battery included delivers up to 3 months runtime Asymmetrical contour with thumb groove reduces wrist strain during prolonged use. Textured grip ensures control Adjustable sensitivity (1000/1200/1600 DPI) with optical sensor for smooth cursor accuracy