Features 1、Standby current (all relays closed) 12MA, 1 relay open 40MA, 2 relays open 67MA, 3 relays open 95MA, 4 relays open 121MA, 5 relays open 147MA, 6 relays open 173MA, 7 relays open 198MA, 8 relays open 223MA. 2、Open, Close, Momentary, Self-locking, Interlock, Delay, 6 Commands. 3、Under the Delay command, the maximum delay is 255 seconds. 4、DC 12V power supply (voltage range 9-13V). 5、This 8 Channel 12V Relay Module, able to control various appliances. Specification Features: Standby current (all relays closed) 12MA, 1 relay open 40MA, 2 relays open 67MA, 3 relays open 95MA, 4 relays open 121MA, 5 relays open 147MA, 6 relays open 173MA, 7 relays open 198MA, 8 relays open 223MA Open, Close, Momentary, Self-locking, Interlock, Delay, 6 Commands. Under the Delay command, the maximum delay is 255 seconds. DC 12V power supply (voltage range 9-13V). This 8 Channel 12V Relay Module, able to control various appliances. Specifications: Power supply: DC 12V Voltage range: 9-13V Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC Quantity: 1pc Size: Approx. 90 x 63 x 18mm / 3.54 x 2.48 x 0.7inch Weight: 115g Note: Please contact us for instruction. Package Included: 1 x 8 Channel RS485 Relay Module Package List