Profeional circuit breaker finder with stable performance and accurate test. Suitable for house, office, factory power network reconstruction and project acceptance. Features: This circuit breaker finder which can automatically adjust sensitivity and find the target circuit breaker or fuse quickly and accurately. It can test whether triangle socket connection is correct and 3 indicators of transmitter show you the socket condition. With flashlight, convenient to use at the dark corner. Suitable for house, office, factory power network reconstruction and project acceptance. The receiver is powered by a 9V battery(not included), low consumption. The transmitter works on AC 220V 50Hz. Low battery warning. Operation: Material: ABS Color: Green + Black Plug Type: EU/220V,US/110V Transmitter Input: AC 220V 50Hz Receiver Power Supply: 1 x 9V Battery(not included) Transmitter Size: 6 x 6.7 x 6.1cm / 2.4 x 2.6 x 2.4in Transmitter Weight: 67g / 2.4oz Receiver Size: 20 x 3 x 4cm / 7.8 x 1.2 x 1.6in Receiver Weight: 129g / 4.6oz Package Size: 26.5 x 16 x 7cm / 10.4 x 6.2 x 2.8in Package Weight: 274g / 9.7oz MASTECH MS5902 American specification 110V: Package List: 1 x Transmitter 1 x Receiver