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 the triangle socket connection is correct and 3 indicator lights can show the socket condition.3. Built-in flashlight for convenient use in dark environments.4. Supports low battery warning.5. Suitable for power grid rebuilding and engineering acceptance in offices, homes, factories, etc.Specifications:: MASTECHModel: MS5902Working Voltage: AC 220VPlug Type: EU plugMaterial: ABSColor: Black + GreenReceiver Power Supply: 1 x 9V Battery (not included)Receiver Size: 20 x 3.8 x 5 cm 7.9 x 1.5 x 2.0 inSocket Tester Size: 6.3 x 7 x 5.5 cm 2.5 x 2.8 x 2.2 inPackage Weight: Approx. 298 g 10.5 ozPackage List:1 x Socket Tester with Transmitter1 x Circuit Breaker Finder with ReceiverNote: When the yellow LED is on, please replace the battery promptly.