Microsoft Wireless Mobile Mouse 3500 Special Edition. Device interface: RF Wireless, Movement detection technology: BlueTrack, Movement resolution: 8000 DPI. Frequency band: 2.4 GHz. Battery technology: Alkaline, Battery type: AA. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -40 - 60 °C, Operating relative humidity range: 5 - 80 %. Mouse weight: 90 g