Sony BMS20 Bluetooth® laser mouse. Device interface: Bluetooth, Movement detection technology: Laser, Movement resolution: 800 DPI. Frequency range: 2.4 GHz, Wireless range: 10 m. Battery technology: Alkaline, Battery type: AA. Mouse dimensions (WxDxH): 53 x 112.4 x 31 mm, Mouse weight: 105 g. Compatible operating systems: Windows 7/Vista/XP, Depth: 112.4 mm, Height: 31 mm