Mixca&reg;Mini Wireless Bluetooth 3.0 6D 1600DPI Optical Mouse Gaming Mice For Computer PC Laptop It is a wireless Bluetooth mouse that delivers a better mix of precision and comfortwith designed-for-Web scrolling and a feel-good, contoured design. The mouse works seamlessly with Bluetooth-enabled laptops, Ultra portable PCs, and tablets without taking up a valuable USB port. Switchable DPI among 800-1200-1600 Working distance: 10M Battery type: 2 x AAA (not included)