The portable pen shaped AC phase & voltage detector can measure the phase sequence and detect AC voltage in 12V～1000V and 48V～1000V, it features of safety non-contact design, adjustable sensitivity, sound and light alarm, LED lighting, easy operation, and high accuracy, which is a professional device for electrical technician and industrial electricians to handle with wiring and cabling. Features: NCV High/Low Sensitivity Adjustable: dual sensitivity AC voltage range of 12V～1000V & 48V～1000V with switching S button. AC Voltage Detection: detect AC voltage by contacting the power socket or getting near the live wire with non-contact tip. NCV Phase Sequence Detection: designed with the function of phase sequence measurement. LED Illumination: with flashlight for auxiliary lighting up the working area, convenient to use at night or dark corner. Other Functions: breakpoint checking, high voltage circuit alarm function, live wire measurement and full wire measurement. Auto Power-off: automatically turn off when no operation and no detection of AC voltage after 3 minutes. Power Supply: just powered by 2pcs AAA batteries, with low battery indication, and easy to install the battery. Specifications: Material: ABS Dual Sensitivity AC Voltage Range: 12～1000V(high sensitivity) / 48～1000V(low sensitivity) (switch with S button) NCV Detection Voltage Range: 12~1000V, 50/60Hz Phase Detection Voltage Range: 90~400V, 50/60Hz Safety Compliance: CAT.IV 600V CAT.III 1000V Operating Temperature: 0~40℃ Storage Temperature: -10~50℃ Humidity: ≤95% Altitude: ≤2000m Power Supply: 2 * 1.5V AAA Battery (NOT included) Item Size: 158 * 24 * 20mm / 6.22 * 0.94 * 0.79in Item Weight: 32g / 1.17oz Package Weight: 52g / 1.85oz Package Size: 16.5 * 3.5 * 3cm / 6.50 * 1.38 * 1.18in Packing List: 1 * Voltage Tester 1 * Manual (English)