Wangdd22 4 Channel 5v Relay Shield Module， Four Channel Relay Control Board Relay Expansion Board for Arduino UNO R3 Mega 2560<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>This relay module is 5V active low.</li><li>It is an 4-channel relay interface board， which can be controlled directly by a wide range of microcontrollers such as For Arduino， AVR， PIC， ARM， PLC， etc.</li><li>It is also able to control various appliances and other equipments with large current.</li><li>Standard interface can be directly connected with microcontrollers.</li><li>Red working status indicator lights are conducive to the safe use.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/61EGo8owduL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/510A5aMVhVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51hyZSVLXmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61EGo8owduL.jpg" noproxy>