MASTECH MS5902 Automatic Circuit Breaker Fuse Finder / Socket Tester Features:1. The circuit breaker finder can automatically adjust sensitivity andfind the target circuit breaker or fuse quickly.2. The socket tester can test whether triangle socket connection iscorrect and 3 indicator lights can show you the socket condition.3. With flashlight, convenient to use in the dark environment.4. Support low battery warning.5. Suitable for power grid rebuilding and engineering acceptance inoffice, home, factory, etc.Specification:: MASTECHModel: MS5902Working Voltage: AC 220VPlugType: EU plugMaterial:ABSColor:Black + GreenReceiverPower Supply: 1 x 9V Battery (Notincluded)ReceiverSize: 20*3.8*5cm / 7.9*1.5*2.0inSocketTester: 6.3*7*5.5cm / 2.5*2.8*2.2inPacketWeight: Approx. 298g/10.5ozPackage list:1 * SocketTester with Transmitter1 * CircuitBreaker Finder with ReceiverNote: When the yellow LED is on, please replace thebattery in time.