Using this Gravity 4 - Pin sensor adapter is a breeze. First, connect your 4 - Pin sensor to the adapter using the press - type terminal. Just press down and the wire will connect securely. Then, choose either 3.3V or 5V power supply according to your needs by using the power switch. When using it, make sure the input voltage matches the setting on the switch. Don't apply excessive force when connecting the wires to avoid damaging the press - type terminal. To maintain this adapter, keep it in a dry and clean place. If it gets dirty, you can use a soft, dry cloth to gently wipe it. That's all you need to know to make the most of your Gravity 4 - Pin sensor adapter.