DR55B01 Motor Forward Reverse Controller Module Self Locking Reverse Polarity Relay(5V ) Item Type: CW/CCW Controller Module Optional Input voltage: DC 5V (5V version), DC 6-24V (12V version) Module working current: forward 2MA, reverse 35-40MA Load voltage: equal to output voltage Load current: maximum. 2A (motor <= 1A) With power indicator and reverse polarity indicator Control mode: low pulse control Size: Approx. 43 x 21 x 16mm / 1.7 x 0.8 x 0.6in Weight: 13.5 g / 0.5 oz(approx.) Pin description: I +: power input +; I-: voltage input-; O +: power output + (The output in reverse polarity is-); O-: power output-(The output in reverse polarity is +); G: trigger signal ground; T: trigger signal input (0.2-2 seconds low pulse). Instructions: 1 After power on, output = input, press the trigger button, reverse polarity output, trigger the button again, output = input, third trigger button, reverse polarity output. And so on. 2 Turn off the power and stop the output.