S_Relay Shield provides an easy ways for smart appliance control. It covers control to normal load circuits with 4 photo-coupled solid state relay capable of switching DC90W (or AC360VA). It also provides stand alone power supply, Bee type wireless module socket, and Native Arduino compatibility. It can be controlled through the digital IO port, such as solenoid valves, lamps, motors and other high current or high voltage devices.
You can download the datasheet here: http://www.seeedstudio.com/depot/datasheet/seeed%20relay%20shield%20datasheet.pdf