Wireless Keyboard and Mouse Combo 100% Bamboo Handcrafted Environmental----Natural Texture, Degradable Easily. Keys:109 keys, Compatible with Windows 2000/98/XP/ME/Vista/Win7/Win8. Connection: 2.4 GHZ Wireless Technology Application Types: Desktop and Laptop. With 7 Multi-media Keys for Convenient in Listening to Music or Watching Video; Check the battery is enough. the mouse is wireless, it is need enough power to transmit signal. f the above can not be resolved, it may be a mechanical failure, we accept return or exchange. Bluetooth signal may be disturbed, You can try to re-code the Bluetooth signal. install the full power battery into mouse. Press the Right,Middle,Left button all the same time, Keep 5 seconds then release it. you should find the red light from bright to dark then keep long light. Please insert the USB Bluetooth Receiver into your PC within 10 seconds . Re-code Success. You can move the mouse to get the response. Reminder: You should keep your battery full power to re-code.