Feature: 1. Wide Application: This leak detector has a wide range of applications, which is suitable for domestic water supply, fire fighting pipes, floor heating pipes, building pipes, municipal construction professional leak detector. 2. 4 Modes: This water leakage detector has 4 modes, which can be adjusted and selected according to different situations. 3. Easy To Use: This water leakage detector has an external headphone sensor, with good listening effect and accurate judgment, which is suitable for use in noisy environments, shielding from external noise, obtaining good listening effect and accurate judgment. 4. Numerical Display: The higher the value displayed by this leak detector, the closer it is to the point of leakage, which can catch different leaks. 5. Excellent Aluminum Alloy And ABS Material: This water leakage detector is made of excellent aluminum alloy and ABS material, which is sturdy and wear resistant, not easy to be damaged. Specification: Item Type: Leakage Monitor Material: Aluminum Alloy, ABS Current: 60mA Amplification: 0-100db Adjustable Operating Temperature: -10~+50°C Operating Time: > 30 Hours Frequency Gear: 1-4 Gear 200HZ-3000HZ Continuously Adjustable Battery ( Shipped With Built In Battery ): Lithium Ion Battery, Model 523412, 8.4V Capacity 1000mah. Package List: 1 x Leakage Monitor1 x Earphone2 x Sensor1 x Sensor Handle 1 x Power Adapter1 x Carrying Case