Electrical Tester, Non-Contact Voltage Detector 12-1000V, Live/Neutral Wire Test, Audible & Visual Buzzer, Flashlight, AC 50-500Hz, NCV Voltage Tester Pen

【Precise Measurement】This electrical voltage tester can detect voltages from 12V to 1000V and distinguish them into 3 voltage classes. The beep alerts you to low, medium, or high sensitivity with different frequencies and LED colors. 【Audible & Visual Buzzer】The voltage level of the electrical tester is displayed on the screen during testing. If the red LED flashes rapidly with an alarm, it indicates that the fire wire is detected. If the red LED does not flash, it means that the line is detected. 【Safety】Non-contact testing and the insulated pen body ensure safety. It flashes and beeps when the device is near an alternating current voltage. The voltage can be detected safely without the help of an electrician or professional. 【Non-Contact Voltage Tester】The insulated casing of the voltage detector ensures safety. It flashes and beeps when the voltage tester pen is near an alternating current voltage. The voltage can be detected safely without the help of an electrician or professional.