Elecom Bluetooth 3.0 Mouse M-NV1BRBK 5 button 9 IR switching Black EWM-I20 Import JPN Product Dimensions package: 10.1 x 6.3 x 3.9 cm; 100 g ; Color : Black Wireless Type : 2.4 GHz Radio Frequency ; Resolution: 500/1250/2000 count (switchable) ; Button : 5 button ; OS Support : Windows 8/RT/7/Vista/XP, Mac OSX (10.6 ~ 10.8) Compliance : Bluetooth 3.0 Class2 ; Continuous operating time : about 142 hours Accessories : Operation check for AAA alkaline batteries  2,  1 User's Manual