1.Quick lookup: UT25A Ac Circuit Tester has stable performance and accurate test. It can quickly and easily identify the correct circuit breaker or fuse to protect a specific electrical circuit. It features a visual flashing light and an audible beeping to alert you when the correct breaker is identified. 2.Sensitivity Adjustable: Sensitivity can be adjusted through the ON/OFF switch. The operator can determine the status of circuit connection according to the 3 LEDs. 3.UT25A Tester consists of two parts: Transmitter And breaker, which is connected to the electrical outlet or fixture a Receiver, which is used to scan the panel to locate the correct breaker. The transmitter works on 110-125V. It supports GFCI test on socket. 4.Application scope: Suitable for house, office, factory power network reconstruction, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store