Connection type: 2.4 GHz wireless technology Wireless action radius: 10 m (33 ft) Battery: 1 AA battery Stack life: 1 year Mouse (height x width x depth): 97.7 mm (3.85 in.) x 61.5 mm (2.42 in.) x 35.2 mm (1.39 in.) Mouse weight: 70.5 g (2.49 oz) without battery Nano receiver (height x width x depth): 6.6 mm (0.24 in) x 14.4 mm (0.57 in) x 18.7 mm (0.74 in) Nano receiver weight: 2.0 g (0.07 oz)