AC Non-Contact LCD Electric Test Pen Voltage Digital Detector Tester 12~1000V Product description: Our non contact AC voltage detector. Can automatically detect the live wire or null wire by visual and audible alert.. Automatic detect high or low voltage base on sound and light speed. Green light blinking and beep sound slow indicats low voltage, red light blinking and beep fast indicats high voltage. It not only tells you whether there is voltage or not, but also tells you if the voltage is high or low. Ideal for testing AC cables, circuit breakers, wall sockets, junction boxes, fuses, etc Safety non-contact voltage detector/tester. It can measure voltage without touching objects, helping you to use it safely. Specification: AC voltage range: 12V-1000V For more specifications and using instructions, please check out the user manual.. Product size: 6.2x0.9x0.9 (in) Outer packaging size: 7.4x1.4x1.1 (in) Package includes: 1 x Voltage test pen