TouchpadThis product has added the innovative function of the mouse wheel, when you press the Fn key, touch any position of the sliding area k with your finger, you can easily realize the mouse wheel function. This user-friendly design makes it easier and better to browse the web and edit documents. Connect the receiverSlide the receiver out of the side of the keyboard and plug in a device with a standard USB port. Once connected, slide the power switch to the "ON" position on the left side of the device to establish the connection. Auto sleep and wake up functionThe keyboard also has auto-sleep and auto-wake modes. The keyboard will automatically go into sleep mode after prolonged inactivity. In sleep mode, the user can press any key to wake up the device. 2. The RF LEDs on the 4 GHz receiver and keyboard will continue to flash and will not lose power. Close the keyboard after useWhen you're done using the keyboard, push the switch to the off position. This will power off the keyboard. The USB receiver should be unplugged from the PC and then plugged back into the keyboard for safe keeping. Install AAA*2 battery (please bring your own), this version does not support charging function.