Features: 100% brand new and high quality Output capacity: AC 250V/30hA, DC 30V/30hA or less These Relay Board use photocoupler isolation that has strong driving ability and stable performance. Using the industrys high-quality ultra-small optocoupler, strong anti-interference ability and stable performance Adopt 9.5mm black fence type terminal, standard 30hA terminal, stable and firm, reliable quality YY-30 (12V) and another 5V, 24V is optional. Package Includes: 1 Piece Relay Module Specifications: Product Model: YY-30 (12V) and another 5V, 24V is optional. Output Capacity: AC 250V/30hA, DC 30V/30hA or less Module Interface Description: 1. DC+: the positive pole- of an external DC power supply 2. DC-: the negative pole- of an external DC power supply 3. NO: The relay is normally open interface, the relay is suspended before it is closed, and it is shorted to COM after it is closed. 4. COM: relay common interface note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.