How to connect Keyboard + mouse combo on tablets and all Bluetooth devices, Atouch x19, idino nb6,7

How to connect Keyboard + mouse combo on tablets and all Bluetooth devices,
like Atouch x19 Life. Atouch X19 Ultra,  idino Notebook 6, Idino Notebook 7 etc

Power on your keyboard, then enable your Bluetooth on the tablet, then press FN + C buttons at the same time,  Bluetooth keyboard will appear in your Bluetooth list then press on it and connect.