Pressing the Fn+F1 keys puts the keyboard in pairing mode. However, if you do not complete the process, it most likely is no longer paired.
Here is a link to the manual:
http://www.riitek.com/uploads/soft/i8.pdf
There, you will find two procedures for pairing:
"1. Take off the USB receiver from back cover of the keyboard
2. Plug the USB Receiver into your device's USB port.Such as android tv box, smart tv
3. Turn on the keyboard.
A blue LED will stay on. That means the keyboard has paired with your device.
You can enjoy the keyboard now! "
Or,
"If the blue LED does not stay on and orange light stay flashing, it means the keyboard need to be paired with your device handly. As for how to pair, please try following steps:
Step1: Keep your PC on, and be sure the keyboard is full of power.:)
Step2:Press the "F1" without releasing.
Step3:Power on the keyboard and release the "F1" immediately.
Step4:Plug the USB receiver on the USB port of your PC.
Wait a moment. The keyboard will repair automatically.
When the yellow light stop flashing and blue led on, it means successful."
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