Operating voltage: power supply 1,DC 6.5-25V; power supply 2,DC 5V

Operating Current: Standby current (all relays closed) 15mA, 1 relay open 45mA, 2 relays open 77mA, 3 relays open 109mA, 4 relays open 140mA

Size: 80x66x19mm

Weight: 79g- On-board resources: 4x opto-isolated inputs (low level trigger, NPN type), 4x buttons, 1 4 bit digital tube display, 1 pair of Pro mini slots, 4 relay outputs.