Gembird MUSW-4B-03-B

Wireless technology: 2.4 GHz, GFSK RF modulation, 80 channels, 32 bit device ID
Operating distance: up to 10 m
Power class: RF power 3 dBm (max. EIRP)
Internal antenna type; antenna gain in dBi (typical): 2 dBi ±1 dBi
Optical resolution: 800, 1200, 1600 DPI selectable by the button
Power supply: AAA battery x 2 pcs (not included)
Power consumption: 3 V DC, up to 20 mA
Nano receiver: USB 1.1 compatible, weight 2 g, 6 x 14 x 18 mm
Mouse: dimensions 103 x 55 x 30 mm, net weight 56.5 g (without batteries)
Operating conditions: -5...45 Celsius degrees, 10-80 % humidity