Features Bistable Circuit Relay This is a typical bistable circuit board. Press the trigger switch to activate the relay and press again to disable the relay. DC12V power supply: the power supply should be DC12V, but cannot be used for cars, as the instantaneous voltage of cars can exceed 12V. Instructions for Use When used for conditions with strong interface, it is recommended to connect a diode in series to the input port and a 470 UF capacitor in parallel with GND. Powerful Performance The trigger switch is connected to the trigger signal, the trigger signal is effective with low lever. The relay module maintains stable and reliable performance, strong anti-interference and is not accidentally triggered. Easy installation screw terminal: designed with screw terminals, it is convenient to wire and easy to use. LED indicator for relay action. Specifications: Power supply: DC 12V Load capacity: 10 A, 250 VAC; 10 A, 30 VDC. Size: 1.5 x 3.5 x 4.5 cm / 0.59 x 1.38 x 1.77 inches. Features: Connect trigger switch with trigger signal, trigger signal is effective with low lever. Designed with screw terminals, it is convenient to wire and easy to use. When used for conditions with strong interface, it is recommended to connect a diode in series to the input port and a 470 UF capacitor in parallel to GND. This is a typical bistable PCB. Press the trigger switch to activate the relay and press again to disable the relay. The power supply should be 12V DC, but cannot be used for cars as the instantaneous voltage of cars can exceed 12V. Package includes: 1 x relay module Package List