Qisan 1800DPI 6 Button Wirless Gaming Mouse, The Nano Receiver(in the battery storage) - White The 2.4GHz Nano Receiver - Plug and play, build-in unique ID code, 10M operation distance. 3 DPI Free Switch: 500/1000/1600 DPI 6 Button: Left click, Right click, 3D wheel, Forward button, Backward button and DPI button. Color: Black, Blue, Orange Package List: 1 x Qisan SR-8509 Wireless Gaming Mouse(Not including battery), 1 x Nano Receiver(in the battery storage)