1、Working Principle: The detector relies on the physics of the sound source of shock waves to transmit sound will gradually amplify the sound, to reach the ear can be heard normally to detect water pipe leaks. 2、Multi Functional: Water pipe leakage monitor kit has multiprotections, such as soundfilter, sound peak limit, spectrum display, double sided probe, expansion hole function. 3、Sound Acquisition: Pickup recorder can collect sound alone, plugged into the HY929 device connector automatically shut down the separate acquisition function, into the connector acquisition state. 4、High Sensitivity: Water leakage detection kit with superior performance, clear sound quality, strong sensitivity, imported components, reliable and practical. 5、Copy to Computer: Comes in the form of a USB stick when water leak detector kit is connected to a computer and can copy the caught sound to the computer. Item Type: Water Leak Detector Material: Plastic Size: Approx. 6.5 x 3.5 x 11cm / 2.6 x 1.4 x 4.3in Battery (Built In Battery): Lithium Battery, Model: 883759, Capacity: 1200mah Working Time: 10-23 Hours (according to the sound intensity) Functions: Soundfilter, sound peak limit, spectrum display, double sided probe, expansion hole function 1. Soundfilter: There are four gears: 0, 1, 2, and 3. Gear 0 is the gear in normal use: gear 1 emphasizes bass detection; gear 2 emphasizes treble detection; gear 3 forces detection. 2. Peak sound limit: When the (SOUND, LIMITERI) function is turned on, the huge peak volume is limited to protect the sensor head and maintenance instrument. It is usually placed in the open position. 3. There are nine display interfaces for spectrum display, which can be switched freely according to your convenience, and the display strength can also be adjusted. 4. Double sided sensing head: FL-550 adopts double sided sensing design, and the sound quality of both sides is different. It is determined which side is clear to use according to the environment. The sensing sensitivity is stronger, the sound is clearer, and the sensitivity and service life are greatly provided. 5. Expansion hole function: (REC) 3.5 jack can be connected with external overlay function, wireless device upgrade of recorder transmitter, etc., and can also be inserted with dual channel lead for direct recording. Pickup parameters Charging Duration: 3-5 hours Battery: Lithium battery, 220mAh (built in battery) Sound Acquisition Time: About 5-6 hours, current about 40 mA Continuous Playback Duration: About 6-7 hours, current about 35 mA Support 32g memory card (not included memory card)Weight: Approx. 1434g / 50.6oz 1 x Water Leak Detector 1 x Sensor Head 1 x Headset 1 x Plug 1 x USB Cable 1 x Aluminum Case 2 x Instruction Manual 1 x Pickup 1 x Accessory