The HY-929 Underground Water Leak Detector by Candeon is a compact acoustic pipe monitor tool designed to detect water pipe leaks. It features a maximum audio amplification factor of 20,000X, allowing for sensitive detection of even the faintest sounds. The device operates on a built-in 3.7V 300mAh lithium battery, with an input of AC 100-240V 50/60Hz 150mA and an output of DC 5V 1000mA. Constructed from ABS and metal materials, this unit measures 6 * 4 * 2cm and weighs 208g, making it suitable for various industrial and commercial applications. It also comes with earphones for easy listening of the audio results.