1Double Probe: Water pipe detector adopts double probe design, including round probe and needle probe, which can be switched according to the site condition. 2Working Principle: This audio device works by amplifying the vibration of the audio. The sound is a waveband, and depending on the size of the sound, this waveband will travel through short and long distances and be amplified by this device. 3Rechargeable: Water pipe detector has built in battery, can be recharged and used repeatedly, small size and compact structure, can be carried around and used. 4Scope of Application: Water leakage tester is 110240V for leak detection of water pipes, cement pipes, steel pipes and other kinds of constructed pipes. 5ABS and Metal: Leak detector is made of ABS and metal, which is wear resistant and durable for long time use.