Hayes 81792BB Black G2 Brake Boss<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Three axis accelerometer automatically levels</li><li>Recommended for medium and heavy duty trailers with 2， 4， 6 and 8 electric trailer brakes</li><li>Audible signaling alert</li><li>High resolution liquid crystal display panel</li><li>Easy-to-use manual emergency lever</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31X1uYyN8JL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/316-QQn4PVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31Ghz47D9%2BL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41kyVMO9oQL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/412IyVxoLNL.jpg" noproxy>