1、The module uses premium quality relay, normally open interfaces, maximum load: AC 250V/10A, DC 30V/10A. 2、SMD optocoupler isolation, strong driving capability, stable performance; trigger current 5mA. 3、Fault-tolerant design, even if the control line is broken, the relay will not operate. 4、Power indicator (green), relay status indicator (red). 5、User-friendly interface design, all interfaces can be directly connected through the terminal block, very convenient. Features: The module uses premium quality relay, normally open interfaces, maximum load: AC 250V/10A, DC 30V/10A. SMD optocoupler isolation, strong driving capability, stable performance; trigger current 5mA. Fault-tolerant design, even if the control line is broken, the relay will not operate. Power indicator (green), relay status indicator (red). User-friendly interface design, all interfaces can be directly connected through the terminal block, very convenient. The module can be set high or low level trigger by jumper Specification: Operating Voltage: DC 5V Maximum Load: AC 250V/10A, DC 30V/10A Trigger Current: 5mA Optional Quantity: 4pcs, 5pcs   Module Interface: Input: 1. DC+: Connected to the positive pole of the power supply (5V) 2. DC-: Connected to the negative pole of the power supply 3. IN: Signal trigger input (set low/high level trigger by jumper) Relay Output: 1. NO: Relay normally open interface, suspended before the relay pulls in, shorted with COM after the relay pulls in 2. COM: Relay common interface 3. NC: Relay normally closed interface, shorted with COM before the relay pulls in, suspended after the relay pulls in   Package List: 4 x Relay Module OR 5x Relay Module Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin