20pcs 1 Channel 12V Level Trigger Optocoupler Relay Module

Feature 1 channel relay module with photoelectric isolationHigh or Low level changeable by a jumper setting trigger The module uses genuine quality relayWith power and relay action indicatorOperating voltage 12VMaximum load AC 250V 10A DC 30V 10ASize 44 x 24 x 17mmWeight 16gPins DC Positive power supply VCC 12V DC Negative power supply GND IN The control end the driving current should be more than 4mACOM The control of loop of earth wireGND GroundNotice High Level Mode the jumper is set between com and gnd original Low Level Mode take down the jumper connect VCC to VCC GND to Control Terminal IN to 5V COM to GND Package included 20 x 12V 1 channel relay module