Features 1、This is a self-locking (bistable) double-pole double-throw relay. Once triggered, the relay pulls in, triggers again, and the relay is disconnected. 2、With power indicator and reverse polarity indicator. 3、Low pulse control mode, safer to use. 4、Made of high-quality electronic components, stable and reliable performance. 5、Easy to install and convenient to use. Specification Item Type: DPDT Relay Module Module Working Current: Forward 2MA, reverse 60-70MA Load Current: 5A maximum (motor <= 3A) Control Mode: Low pulse control Size: Approx. 39.5 x 33.3 x 23.3mm / 1.6 x 1.3 x 0.9in Pin Description: V: Power positive G: Power negative terminal and trigger signal ground terminal; T: Trigger signal input (0.2-2 seconds low pulse). NO1: Relay normally open port COM1: Relay common port NC1: Relay normally closed port NO2: Relay normally open port COM2: Relay common port NC2: Relay normally closed port How to use: When the power is turned on, the relay is turned off. Click the trigger port (T port) to pull in the relay, click the relay to release again, and so on. Package List 1 x DPDT Relay Module