AC Voltage Detector NCV - Dekko NCV-01 + UV Light AC Voltage Detector - Accurately detects AC voltage ranging from 12V-1000V, distinguishing them through 3 different frequency alarm sound and light Built-in Flashlight - Illuminate dim areas to make work easier, the LED torch allows operation even on dark corners. Auto power off can extend battery longevity for high efficiency Clear Sound amp; Light Indicator - Voltage frequency can be distinguished by beep and LED indicator. The higher the voltage, the higher the audible alarm frequency - great, even in noisy environment Non-Contact Volt Detectorv - The voltage pen tester distinguish the live and null wire in a non-contact way, can be used in circuit breakers, lighting fixtures, switches, outlets, wires and anywhere you need it