Features: Instrument for searching and confirming the location of water pipe leaks. Detects pipe leakage by amplifying sound through headphones; sound level is adjustable. Equipped with dual probes, including a circular probe and a needle probe, to handle various situations. Constructed from high-quality ABS plastic and metal for durability and wear resistance. Compact size and built-in rechargeable lithium battery for portability and convenience. EU plug type, suitable for use in multiple regions. Highly sensitive with adjustable volume control to prevent ear discomfort. Specifications: Material: Plastic + Metal Color: As shown Input: AC 100240V, 50/60Hz, 150mA Output: DC 5V, 1000mA Working Current: 10mA Maximum Audio Amplification Factor: 20,000X Built-in Battery: 3.7V 300mAh Lithium Battery Item Size: 6 x 4 x 2cm / 2.4 x 1.6 x 0.8in Item Weight: 208g / 7.3oz Package Contents: 1 x Detector Sensor 1 x Adaptor 1 x Circular Probe 1 x Needle Probe 1 x USB Cable 1 x Earphone Note: Light reflection and differences in display screens may cause slight variations in color compared to the actual item. Measurement error allowance: +/- 13cm.