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Our suppliers have 16 years of experience in the development and design Production of meters, focusing on the production of high-quality and Safe products. 1. Wide Testing Range. All electric appliances in your family can be tested by it, such as circuit breakers, lighting fixtures, switches, outlets, wires and anywhere you need it . 2.100% Safe. Test in a non-contact way, so do not worry about being shocked by the electricity. 3. Safety Warning. As long as voltage is detected, there will be LED flashes and buzzer. 4. Easy to use and carry. Note1.This function is designed for voltage detection in the weak electric field. 2. Please have a check whether the LED in the power button is lighted before you use it, in order to make sure the tester is operational. Specifications: Operating Voltage: 12--1000V ACFrequency: 50--60Hz Alarm Mode: Sound and lightNCV Sensitivity: Three levels (low, medium, high) NCV Empfindlichkeit: AutomatischWorking temperature: 0 ~ 40 ℃Storage temperature: -10 ~ 50 ℃Working height (altitude):