The MS5902R Circuit Breaker Finder/Socket Tester is use to find correct breaker or fuse and test socket. You will have annoyance no more for locating the correct circuit breaker supplying power to an AC outlet or lighting fixture. Multifunctional Circuit Breaker Finder Socket Tester Circuit breaker search function NCV measurement function Strong power (Less than 250V) wire finding function Zero line/fire line discrimination NCV sensitivity adjustment Flashlight lighting function Low-voltage battery alarm Socket test function Specifications: Test Voltage: AC110V-250V Function 1: Socket Tester Function 2: NCV Measurement Function 3: Circuit Breaker Finder Function 4: Zero/Fire Line Discriminator Warm Prompt: Batteries are not included in delivery due to restriction on flight. Maintenance: 1. Keep clean with a dry cloth. 2. When the yellow LED is light on the MS5902R, please unscrew and remove cover, insert 9V battery so as to the MS5902-R is well-balanced. Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Different batches may have different appearances, but will not affect the use Voltage: AC110-250V Colour:Green Material:ABS Package Contents: 1 x Circuit Breaker Finder(1 x 9V 6F22 battery not included) 1 x Socket Tester