Feature: 1. [Metal Material] Water pipe leakage monitor has a full metal body, fine workmanship, is a professional high accuracy instrumentation equipment. 2. [High Performance] This water leakage detection monitor has premium performance, using imported components, clear sound quality, high sensitivity. 3. [Adjustable] Water pipe leakage detector with earphone, with four levels of sound strength adjustable to meet different conditions of use. 4. [Transmission Function] Wall pipe leakage tester built in FM radio transmission module, can transmit the signal to the wireless remote control. 5. [Expandable Function] With the expansion of the jack, this wall pipe leak listen monitor can perform additional functions to external devices. Specification: Item Type: Water Pipe Leakage Monitor Material: Stainless Steel Probe Sensitivity: -70Ddb Maximum Sound Amplification: 20,000 Times Penetration: Wall, Water Pipes, Cement Pipes, Steel Pipes Battery Type: Built in 800mAh Lithium Ion Battery. Package List: 1 x Water Pipe Leakage Monitor2 x Probe1 x Antenna1 x Earphone1 x Power Adapter1 x Instruction Manual1 x Storage Box