4 Channel SPDT power relay interface module, high quality JQC-3FF 10Amp relays.
Darlington transistor circuits drive relay coil, LED indicator for each relay channel.
High quality screw terminal block.
FR-4 fiber glass PCB, dual copper layers.
Fireproof nylon material DIN rail mount carrier, can support width 35mm / 32mm / 15mm rail, and the carrier can be taken apart for panel mount use.

Operating Voltage / Current (VCC): 3.8 to 7.5VDC / 350mA(at 5VDC).
Control signal voltage (IN-X):
0V - 0.5Vdc (low level), relay not action.
2.5V - 24Vdc (high level), relay action.

Output (relay switch) contact rating for each channel:
For AC, 125 / 277 VAC, 10 Amp
For DC, 28 VDC, 10 Amp

External dimensions: L82mm x W87mm x H43mm.
PCB dimensions: L80mm x W72mm x H15.5mm