MR CARTOOL Ultrasonic Leak Detector & Transmitter Locator to leaks Air, Water, Dust with Headphone Accessory Kit LED Indication

Was finally able to find the leak we've been searching for, for over a year.

I purchased this to detect a water leak in a wall. It has zero instruction on water leaks. Doesn't even elude to that feature. The seller put water leak detection info into the listing to trick people into purchasing it. They can stick this device where the sun doesn't shine. It's getting returned immediately.

I dont understand what it is suppose to do. The sensitivty is about 4-6 inches. I have an Amprobe Ulttasonic that we used this past week and found the leak under a house while inside by the hvac system This unit is not of any use to me at all.The only time it worked for me was to open a freon bottle and get within 4-6 inches of the gas coming out.