Feature 1 The circuit breaker finder can automatically adjust sensitivity and find the target circuit breaker or fuse quickly. 2 The socket tester can test whether triangle socket connection is correct 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 in office, home, factory, etc.Features:1. The circuit breaker finder can automatically adjust sensitivity and find the target circuit breaker or fuse quickly.2. The socket tester can test whether triangle socket connection is correct 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 in office, home, factory, etc. Specification:Brand: HISITEK Model: MS5902Working Voltage: AC 110-220VPlug Type: EU plugMaterial: ABSColor: Black + GreenReceiver Power Supply: 1 x 9V Battery (Not included)Receiver Size: 20*3.8*5cm / 7.9*1.5*2.0inSocket Tester: 6.3*7*5.5cm / 2.5*2.8*2.2inPacket Weight: Approx. 298g/10.5ozPackage list:1 x Socket Tester with Transmitter1 x Circuit Breaker Finder with Receiver1 x Storage Bag1 x ManualNote: When the yellow LED is on, please replace the battery in time.