The USB receiver must be synchronized with the working frequency of the wireless mouse and keyboard for normal use. Please follow the steps below to synchronize the mouse and keyboard.

Synchronize mouse and keyboard with USB receiver:

　1. Plug the USB receiver into one of the available USB ports.

2. Press the button on the USB receiver to turn on the sync mode. When entering sync mode, the LED indicator flashes blue.

3. Press the sync button of the mouse to synchronize the mouse with the USB receiver.

4. Press the sync button on the USB receiver again, the indicator light flashes blue, press the keyboard sync button to synchronize it with the receiver.

5. Your mouse and keyboard should now be synchronized with your computer and can be used normally.