Item Type: Pipe Water Leakage Detector Material: Metal Probe Sensitivity: -60dB Sound Amplification: 25000 Times 4 Segment Sound Selection: 3 Speed (100Hz-700Hz), 2 Speed (700Hz-900Hz), 1 Speed (900Hz-1100Hz), 0 Speed (1100Hz-1600Hz) Battery Type: Built in 320mAh 6F22/9V Carbon Battery Package List 1 x Pipe Water Leakage Detector 1 x Probe 1 x Probe Protection Cover 1 x Earphone 1 x Storage Box 1 x Chinese and Japanese Manual 1Principle: Leak detector works by relying on the physics of the sound source of the shock wave to transmit sound will gradually amplify the sound, into the ear can be heard normally, the larger the detection of water pipe leak, the better the effect. 2High Sensitivity: The pipe leakage detectors have superior performance, clear sound quality, strong sensitivity and imported components. 34 Speed Adjustment: The pipe water leakage detector uses 4 speed adjustment to meet different conditions of use. 4Metal Material: The water pipe leakage monitor is made of full metal body with fine workmanship, which is precise and professional instrumentation. 5Compact and Portable: Underground pipe water monitor is compact and easy to carry, suitable for a variety of pipes and floor drains detection.