1、Very durable, high accuracy relay module can be easy to use in the practical life. 2、As a low pulse trigger, trigger mode supports high performance according to strict rule. 3、Supports simple installation, relay board with strong stability not requires particularly complicated operations. 4、After many inspections before leaving the factory, relay module's quality is guaranteed, you can use it with confidence. 5、Built to strict quality control standards, 2-channel relay is improved for more durability. Item Type: Relay module Model: SL35B02 Working Current: 1 relay pull-in 70MA, 2 relay pull-in 140MA Static Working Current: 0.24mA Trigger Mode: Low level trigger Pin Description: V: Positive power supply G: Negative terminal of power supply and ground terminal of trigger signal; T (T1 / T2 / T3 / T4): Trigger signal input (0.2-2 second low pulse). NO: Relay normally open port COM: Relay common port NC: Relay normally closed port Instructions: While at power-on, the relay opens. Click the trigger port (T1 / T2 / T3 / T4 port) relay to pull in (and hold), then click the relay again to disconnect, and so on. 1 x Relay Module