HISITEK MS5902 Automatic Circuit Breaker Fuse Finder Socket Tester 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 e 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: MS5902 Material: ABS Color: Black + Green Receiver Power Supply: 1 x 9V 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 Packet Weight: Approx. 298g/10.5oz Package list: 1 x Socket Tester with Transmitter 1 x Circuit Breaker Finder with Receiver 1 x Storage Bag 1 x Manual Note: When the yellow LED is on, please replace the battery in time.