?? Non Contact Voltage Detection?- The NCV test is a great feature that let you know any voltage over 90V(RMS) without touching wires, safe and convenient for home users to find breaks in circuits. ??Professional ?- Completely capable of testing voltage, current, resistance, diode, continuity, can safely applies to diagnose, assemble, and maintain household fuses, wiring, general-purpose batteries, car wiring, automotive circuitry and more. ?? Safe for Your Life?- Double insulation shell secures your safety when operating. And the protective sleeve is made of non-slip, slightly soft plastic, good for our products. / Overload protection, using the PTC protection circuit for resistance and frequency measurement. ?? Accurate Measurement & Convenient Usage?- 2000 counts with large 3 1/2 digital LCD backlight display provides all age groups with visibility and quick reading in poor light areas/low battery indication / audible continuity / data hold / kickstand at the back for easy-to-read. ?? Wide Range of Applications?- No matter you are a professional electrician or a DIY hobby, this is a practical and affordable tool built for everyday use. Also widely used in and around houses, schools and laboratories.