Power
Press it for 2-3 seconds and the light will turn on.
Connect
Press the 'CONNECT' button and when you hear a beep, click the PC button.
Charge
Where to connect the charger. The new version is C type and the old version is 5 pin.
Reset
This is a button to turn off the device. It is not very useful because the power is turned off when the program is closed.