2 DPDT signal relay module. TAKAMISAWA RY5W-K high quality relays, switch contact material - gold overlay silver-palladium.
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.
Taiwan DINKLE fireproof nylon material DIN rail mount carrier (not China low quality carrier), can support width 35mm / 32mm / 15mm rail, and the carrier can be taken apart for panel mount use.

Operating Voltage / Current (VCC): 3.6 to 6.5VDC / 100mA(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 switch:
For AC, 120VAC / 0.5Amp
For DC, 24 VDC / 1.0Amp

External dimensions: L49.5mm x W87mm x H38.5mm.
PCB dimensions: L47.35mm x W72.5mm x H14.1mm

Datasheet: