Features： 1、Advanced Technology: The water leakage detector adopts new components and the most advanced technology in Japan, which increases the penetration force several times and greatly improves the sound quality. 2、Strong Penetrability: The water pipe leak detector has strong penetrability, whether it is water pipe, cement pipe or steel pipe, it can play a very good effect. 3、Sound and Dual Detectors: The volume of the sound can be adjusted and switched according to the situation on site. Dual detector design, including probe and stylus. 4、Wide Range of Applications: The water leak detector has strong practicability and is suitable for leak detection of various construction pipelines. 5、3.7V Lithium Battery: Built in 3.7V lithium battery, which can be recharged repeatedly, have long service life and easy to use. Specification： Item Type: Water Leak Detector Material: ABS Color: As Pictures Shown Weight: Approx. 322g / 11.4oz Current Consumption: 15mA Applicable Battery: Lithium Battery 3.7V(Delivered with Built in Battery) Battery Model: 571935 Battery Capacity: 350mAh Probe Sensitivity: -70Ddb Highest Audio Magnification: 20000X Penetration: Water Pipe, Cement Pipe, Steel Pipe Product Size: Approx. 6x5.8x2.3cm / 2.4x2.3x0.9in Answering Method: 32 ohm Headphones, Can Be Connected To 16 ohm Speakers Package List： 1 x Water Leak Detector 1 x Probe Pin 1 x Headphone 1 x Probe 1 x USB Cable 1 x Manual