Extech MD10 Non-contact Magnet Detector with Built-in Flashlight<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Detects the presence of magnetic field without contact (AC， DC， and permanent magnets)</li><li>Ideal for testing audio speakers and relays with coils and electrically controlled solenoid valves</li><li>Blue LED lights up for visual magnetic field indication</li><li>Magnetic field detection range: 63H， 98H， 401H， 810H</li><li>Low battery indicator</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31seHgBcltL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31NL-bCzRcL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41AIPCOQfIL.jpg" noproxy>