Features: Special instrument for searching and confirming the location of water pipe leaks. Detects pipe leakage by amplifying sound with headphones; sound level is adjustable. Equipped with dual probes, including a circular probe and a needle probe, to handle various situations. Made of high-quality ABS and metal materials, durable and resistant to damage. Plug Type: EU Plug, suitable for use in countries such as Germany, France, Spain, Italy, and others. Highly sensitive detection; volume can be adjusted gradually to avoid ear discomfort. Compact size with built-in rechargeable lithium battery, portable and convenient for measurements. Specifications: Material: Plastic + Metal Color: As shown in picture Input: AC 100-240V 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 Voltage: AC 100-240V Package Contents: 1 x Detector Sensor 1 x Adapter 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 between the image and the actual item. Measurement error allowance is +/- 1-3cm.