19sm 2.4G dongle and Bluetooth connection switching 

2.4G RF connection method
1. Take the receiver out
2. Plug it into the device
3. Press FN+~ at the same time, orange light for 2.4g dongle
4. Press and hold FN+F1 til light is blinking
5. Press the touchpad to move the cursor, 2.4g connection is successful
Bluetooth connection method
1. Press FN+~ again, blue light for bluetooth
2. press and hold FN+F1 til light is blinking
3. Go to device settings and add bluetooth then you're done
Amazon link:
www.amazon.com...