E211 FD Optical 2.4Ghz Wireless Wireless 1 Battery Mouse Tracking Method: Optical Place of Origin: Guangdong, China Type: 2.4Ghz Wireless Interface Type: usb Power Type: Battery Number of Rollers: 1 Number of Buttons: 3 Products Status: Stock Application: Desktop, LAPTOP DPI: 1600 Style: 3D Hand Orientation: Both Hands Brand Name: FD Model Number: E211 Ergonomics: Yes Interface type: Wireless