Function: Portable packaging box, durable and easy to and carry. 1. Fine Workmanship: This professional leak detector has fine workmanship and is a sophisticated professional instrument that can detect leaks accurately and efficiently. 2. Working Principle: The working principle of the instrument is to rely on the of the to transmit the sound and gradually amplify the sound until it can be heard normally. 3. Strong Sensitivity: This leak detector has superior performance, strong sensitivity, leak detection in one second, components. Clear sound quality: that of leakage is amplified by 25000 , high-definition sound quality, can capture smaller noises. Four gears adjustment: This detector has four gears that can be adjusted, and different gears can be used according to different situations to meet different conditions. Applicable to sound detectors, water pipe floor heating leak detectors, and automobile abnormal noise inspection instruments Specification: color:as shown Material: stainless steel +PP Battery type: lithium battery ( included ) Voltage: 9V Manufacturing models: 6F22 Battery Capacity: 300mAh Working time: 10-23 hours (depending on sound intensity) Four audio choices: 3-speed (100Hz-700Hz), 2-speed (700Hz-900Hz), 1-speed (900Hz-100Hz), 0-speed (1100Hz-1600Hz) Probe Sensitivity: -60db Audio Magnification: 25000x Package Contents: 1 x detector 1 x Probe 1 x Earphone 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.