Product Description:

 In doing interactive projects using Arduino, a lot of high current or high voltage devices usually can not be directly used the Arduino digital IO port control

(Such as solenoid valves, lamps, motors, etc.), then you can consider using the relay programs to address.
Arduino Relay Shield is the use of high-quality relay Songle provides two inputs and outputs can be connected up to the exchange equipment 250V/10A
Or 24V/10A DC device, thus can be used to control the lamps, motors and other devices.
The modular design makes it easy to connect with Arduino expansion boards. Relay output state by a light-emitting diode that facilitate practical use.

Technical parameters:
Control signal: TTL level
Rated load:
10A250VAC
10A125VAC
10A30DC
10A28VDC
Rated through current: 10A (NO) 5A (NC)
Maximum switching voltage: 250VAC 30VDC

Contact action time: 10ms less
Module pin definitions:
1.1 feet -2 foot - control side,
(2) Power supply (VCC)
3 ground (GND)