I bought this by mistake, I got this one and the camera with locator. Vevor convinced me to keep it. Glad I did, a little smaller head than the larger locator camera, will fit in 3/4 polly pipe or 1" pex to locate domestic water breaks. Paid for itself on 1st use. Your looking at around 1k to call a plumber to camera a line. Also can screw on 512hz locator head if you have the reciever. Not as nice as the case mounted camera but has a definite purpose. I use this one for clean pipe and hvac duct work.