Circuit Breaker FinderThe job of Circuit Breaker Finder / Socket Tester (MS5902) is to find the correct circuit breaker or fuse and test socket. No more frustration trying to find the right circuit breaker to power an AC outlet or light fixture. Good PerformanceThe circuit breaker finder can automatically adjust the sensitivity and quickly find the target circuit breaker or fuse. The socket tester can test whether the connection of the triangle socket is correct, and 3 indicator lights can show you the status of the socket. AdvantageAutomatically and quickly finds the right circuit breaker or fuse. Quickly and easily identifies circuit outlet status. Operating temperature: 0 ~ 50C. With flashlight, convenient to use in dark environment. Supports low battery warning. Suitable for power grid reconstruction and technical acceptance in offices, homes, factories, etc. MaintenanceKeep clean with a dry cloth. When the yellow LED of MS5902-R is on, please unscrew and remove the cover, insert a 9V battery to keep the MS5902-R well balanced. Warning Please be extremely careful when using the MS5902 in the giant breaker ark. Do not use when voltage is higher than 120V/230V AC. You can turn on the flashlight in a dark environment. MS5902-T Operates on 220 VAC, MS5902-TB Operates on 110 VAC. Specification: Model: MS5902 Working Voltage: AC 220V Plug Type: EU Plug Material: ABS Color: Black + Green Receiver Power Supply: 1 x 9V Battery (Not Included) Receiver Size: 20*3.8*5cm / 7.9*1.5* 2.0in Socket Tester: 6.3*7*5.5cm / 2.5*2.8*2.2in Package Weight: Approx. 298g/10.5oz Package List: 1 * SocketTester with Transmitter 1 * Circuit Breaker Detector with Receiver Note: When the yellow LED is on, please replace the battery in time.