The portable pen shaped AC phase & voltage detector can measure the phase sequence and detect AC voltage in 12V1000V and 48V1000V, 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 12V1000V & 48V1000V 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: ABSDual Sensitivity AC Voltage Range: 121000V(high sensitivity) / 481000V(low sensitivity) (switch with S button)NCV Detection Voltage Range: 12~1000V, 50/60HzPhase Detection Voltage Range: 90~400V, 50/60HzSafety Compliance: CAT.IV 600V CAT.III 1000VOperating Temperature: 0~40Storage Temperature: -10~50Humidity: 95%Altitude: 2000mPower Supply: 2 * 1.5V AAA Battery (NOT included)Item Size: 158 * 24 * 20mm / 6.22 * 0.94 * 0.79inItem Weight: 32g / 1.17ozPackage Weight: 52g / 1.85ozPackage Size: 1 6.5 * 3.5 * 3cm / 6.50 * 1.38 * 1.18inPacking List:1 * Voltage Tester1 * Manual (English)