1,Automatic Adjustment Of Sensitivity: This outlet tester can automatically adjust the sensitivity to quickly find the target circuit breaker or fuse, to ensure the safety of home electricity and other safety issues. 2,Indicator Light Design: This outlet tester supports low battery warning, which can test whether the triangle outlet is connected correctly, 3 indicator lights can show the outlet condition. 3,Easy To Read: This outlet tester with flashlight is easy to use in a dark environment to quickly determine if the wiring is correct, 0 wires are missing, 0 reverse ignition and more. 4,Excellent ABS Material: This socket tester is made of excellent ABS material for the shell, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 5,Wide Application: This socket tester has a wide range of applications and is suitable for reconstruction of power grids and project acceptance in offices, homes, factories and other kitchens or bathrooms. Item Type: Circuit Breaker Finder Material: ABS Battery: 6F22 9V Battery x 1 ( Shipped Without Battery ) Alarm Mode: Sound And Light Alarm Neutral Wire, Live Wire Judgment: Yes FIND Adjustment Sensitivity: Yes 1 x Circuit Breaker Finder 1 x Socket 1 x Storage Bag Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.