UNI-T UT25A Automatic Circuit Breaker Finder Socket Tester with LED Indicator NCV Indication Profeional circuit breaker finder with stable performance and accurate test. Suitable for house, office, factory power network reconstruction, etc. Features: Find circuit breaker or circuit fuse quickly and accurately. Sensitivity can be adjusted through the ON/OFF switch. The operator can determine the status of circuit connection according to the 3 LEDs. Support GFCI test on socket. The receiver is powered by a 9V battery(not included). The transmitter works on 110-125V. Specification Receiver: Type: UT25A Operating Voltage: 90-120V Operating Frequency: 50-60Hz Power Supply: 1 * 9V Type 1604/6F22 Battery(not included) Operating Temperature: 5C-40C Transmitter: Working Voltage: 110-125V Operating Frequency: 50-60Hz Fuse: 1A, 250V, Dia.:4*11mm Receiver Size: 19 * 5 * 3cm / 7.48 * 1.97 * 1.18in Receiver Weight: 91g / 3.22oz Transmitter Size: 10.5 * 5 * 2.5cm / 4.13 * 1.97 * 0.98in Transmitter Weight: 79g / 2.81oz Package List: 27.5 * 16 * 4cm / 10.83 * 6.3 * 1.57in Package Weight: 261g / 9.25oz Package List: 1 * Circuit Breaker Finder(Receiver) 1 * Socket Tester(Transmitter) 1 * User Manual Batteries not included Please note: this machine only has US plug