all-sun 4 in 1 multi detector Distance Meter / AC Wire Tracker / Wood Stud Finder / Metal Detector<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Power supplied by 1 piece 9V 6F22 battery.</li><li>This product can help to find metallic pipes in concrete， find the electrical box， exhaust vent， conduit， rebar and ducting.</li><li>It can trace hot wires behind ceiling， floor， and wall .</li><li>It owns spotlight， pencil hole， pencil slider， and a measure tape to measure the length of an object as well.</li><li>Portable size and easy to test.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41wCfcAwUAL.jpg" noproxy>