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 and forward and it fits nicely into the palm of your hand. Feature - Color: Blue - 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 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 . Package list: 1 x Flat Wireless Mouse 1 x Mini Receiver