Specification: Item Type: Water Pipe Leakage Monitor_x000D_Material: Stainless Steel_x000D_Probe Sensitivity: -70Ddb_x000D_Maximum Sound Amplification: 20,000 Times_x000D_Penetration: Wall, Water Pipes, Cement Pipes, Steel Pipes_x000D_Battery Type: Built in 800mAh Lithium Ion Battery_x000D_Four Sound Options: A Gear (200hz), B Gear (800hz), C Gear (1200hz), D Gear (Probe Tube)_x000D_Adapter Specification: 110-240v Features: 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. PackageList: 1 x_x000D__x000D_WaterPipeLeakageMonitor 2 x Probe 1 x Antenna 1 x Earphone 1 x Power Adapter 1 x Instruction Manual 1 x Storage Box