Description This item is a wireless mouse. It has 3 DPI levels to meet your different demands, clicking the DPI button to chose the 800/1200/1600 level. Its ergonomic design allows you to stretch your hands nearly flat to move up and forward and it fits nicely into the palm of your hand. Feature - Color: Black- Material: ABS- Size: 12.2x5.7x2.3cm/4.8x2.2x0.9inch- USB port: USB 2.0. - Interface: 2.4G.- Rated Current: 6mA- Working Frequency: 2.402-2.480GHz- Transmission Speed: 1-2M/s- Compatible with Windows XP, Vista, Win 7, Win8, Win10.- Power supply: 2 x AAA battery (not included).- Up to 10 meters of operating distance. - Maximum resolution: 1600 DPI, and 3-level adjustable DPI: 800/1200/1600 DPI, meet your various need.- It will automatically go into sleep mode if there are input infromation for 5 minutes to save the power. You can also turn switch off when you don't use it. - Lightweight, ergonomic and compact design makes it comfortable for long time use - The mini receiver can be inserted permanently into usb port without worrying about damaging or losing it. Packing list: 1 x Flat Wireless Mouse1 x Mini Receiver