Special inst ent for searching and confirming the location of water pipe leak. Detect pipe leakage by amplifying the sound with headphones, you can adjust the sound level. With dual probes, including circular probe and needle probe to cope with different situations. Made of ABS and metal, wear- and , not easy to damage. Small size, built-in rechargeable lithium battery, convenient to carry and measure. 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 Weight: 250g Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage:110V-240V Material: ABS + Metal Color: Black Package Contents: 1 * Host 1 * Adaptor 1 * Circular Probe 1 * Needle Probe 1 * USB Cable 1 * Earphone 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.