1. The circuit breaker finder can automatically adjust the sensitivity and quickly find the desired circuit breaker or fuse. 2. The socket tester can test whether the triangular socket connection is correct, and 3 indicator lights can display the socket status. 3. With flashlight, convenient to use in dark environment. 4. Supports low battery warning. 5. Suitable for power grid reconstruction and construction approval in office, home, factory, etc. Specification Features 1. The circuit breaker finder can automatically adjust the sensitivity and quickly find the desired circuit breaker or fuse. 2. The socket tester can test whether the triangular socket connection is correct, and 3 indicator lights can display the socket status. 3. With flashlight, convenient to use in dark environment. 4. Supports low battery warning. 5. Suitable for power grid reconstruction and construction approval in office, home, factory, etc. Specification Brand MASTECH Model MS5902 Working Voltage 220V AC Plug Type EU Plug Material ABS Color Black Green Receiver Power Supply 19V 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 Appro. 298g 10.5oz Package List 1 Socket Tester with Transmitter 1 Circuit Breaker Finder with Receiver Note When the yellow LED is on, please replace the battery in time.