STEELMAN PRO 78922 Bluetooth Trailer Tester<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Users can quickly and efficiently test electrical signals by themselves</li><li>Plugs into six-way trailer connector found on back of all trucks</li><li>Corresponding App will show you if any signals are malfunctioning</li><li>Tests brake lights， running lights， reverse lights， turn signals， and even electric trailer brakes</li><li>Helps to quickly diagnose and fix the exact malfunction for safe driving</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31jvhzteAlL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31gYkDSqlnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/316Hr0mOU0L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51FBbIlmcqL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51eUDnROt0L.jpg" noproxy>