Feature:1. Lightweight Ultra Thin: Slim and lightweight design. Lightweight and portable design is the best choice for travel2. Mute Button: The left and right buttons of the mouse are silent, which is suitable for libraries, conference rooms, cafes and other places3. Touch Scrolling: 2 way touch scrolling, smoothly and intuitive navigation.With high sensitivity and accurate positioning4. Widely Compatible: Suitable for BT devices running for Windows XP, vista, 7, 8 and 105. Energy Conservation Design: Energy saving design ensures lower power consumption and longer working timeSpecification:Item Type: Wireless MouseMaterial: ABSInterface: USB2.0Cursor Speed: 1200DPIBattery Used: 1 x No. 7 Battery (Shipped Without Battery).Package List:1 x Wireless Mouse1 x Signal ReceiverNote:The device is delivered without batteries