Features: 100% brand new and high quality Adopted of high quality electronic components, and precision process, ensure for the durability This is a bistable (self-locking) relay module that triggers once the relay pulls (and holds); Trigger again, relay release (and hold) Typical applications:Automotive electronics,Industrial equipment,engine, LED,Smart home, Emergency lighting,MCU development board, Toy car USE : By default, the relay is release, press the trigger button, the relay pull, press again, the relay release, the third press, the relay pull, and so on Specification: Working voltage: DC 6-24v Operating current: 60-70mA Standby current: 1UA Load current: AC 250V / 10A, DC 30V / 10A Trigger mode: low pulse trigger Weight: Approx.15g/0.5oz Module interface: 1. VCC: positive power supply (VCC) 2. GND: negative power supply (GND) 3. T : Low pulse trigger Relay outputs: 1. NO: normally open relay interface 2. COM: Common Interface Relays 3. NC: normally closed relay interface Package list: 1 x Low Pulse Trigger Board