Neewer 2.4G Wireless USB Optical Mouse PC Laptop w/ Mini Receiver Black and Silver 2.4G Wireless USB Optical Mouse w/ Mini Receiver Black and Silver Color: Black and Silver Comes with a mini receiver, only the thickness of two coins Optical sensor up to 800/1600 dpi. Switchable dpi among 800/1600. Power: 2* AAA Battery (not included)