1. The power supply: 5V 2. Module size: 52.8mm x 32mm x 18mm 3. According to the board of the key, or an external button to make the relay module to attract or disconnect, click on the pull, and then press the button to disconnect, low level trigger. Power on again when the relay is in off state. 4.The secondary output end of the relay to withstand the maximum current is 10A, that is the maximum working current cannot be accused of a circuit or device is greater than 10A, according to their own needs to be connected to the normally open or normally closed terminal. 5. Reserved external pull lights welding position, and the board has good welding the attraction indication lamp.