2 channel SPDT 10Amp power relays, High quality Panasonic JS1-24V-F relays.
Opto-Isolated for effective isolation between input and output circuits.
High quality pluggable screw terminal blocks.
Power supply reverse polarity protection, control signal reverse polarity protection. if you accidentally reverse these polarity, the module will not work, will not damage the module.
LED indicator for each relay channel.
Power supply ground(PGND) and Signal ground(SGND) separation design, you can also easily use short-circuit cap to connect together.

Operating voltage range: 17~31.2V DC
Operating current (relay all action): 40mA @24V
Operating current (relay all no action): 0mA
Control signal input: Low level(Relay no action) 0V ~ 0.5V, High level(Relay action) 3V~27V
Output (relay switch) contact rating:
Maximum voltage: 250VAC / 100VDC
Maximum current: 10Amp @125VAC, 6Amp @250VAC, 5Amp @100VDC

Ideal for home control and industrial applications.
In order to allow customers to flexible wiring use, terminal block unassembled(not soldered), other components all soldered and module test passed.

Datasheet: