Dual SPDT Power Relay Module, for Arduino Project Applications.

Can be directly plugged into Arudino UNO R3 or MEGA 2560 R3 board, avoiding some painful wires connection.
G5LA-14 12V Power Relays, LED indicator for each relay action.
Screw terminal block connect relay switch and external power supply.
Two tact switches (momentary) you can use them flexibly via Arduino firmware.
On board jumper option, you can choose power supply from Arduino VIN or terminal block. 

Operating Voltage / Current (max.): 9 ~ 18 VDC / 80mA.
Relay max. switching voltage: 24 VDC.
Relay max. switching current: 10A(NO), 5A(NC).
PCB dimensions: 49mm x 53mm.

Note: the item not include Arduino UNO or MEGA 2560 module.

Datasheet: