1 Piece DPDT Signal Relay Module Board.

This item has been assembled, and electrical test passed.
High quality signal relay, FR-4 Fiber glass PCB, darlington transistor driving relay, LED indicator for relay action.
Size: 50 x 34.9 x 16 mm (approximately 2" x 1.37" x 0.64"), PCB thickness: 1.6mm.

Power Supply: 12V DC / 30mA (relay ON).

Input control signal voltage: 
0V - 0.5V Low stage (relay is OFF),
0.5V – 2.5V (unknown state).
2.5V - 24V High state (relay is ON).
Input control signal high state current:
2.5V: 0.1mA
5V: 0.35mA
12V: 1.1mA
20V: 1.9mA

Relay: 
RY12W-K signal relay.
Contact Material: Gold Overlay Silver-Palladium.

This is a very simple module board, no paper specifications, any questions, feel free to tell me.