Features:Non-contact and Pen Shaped Design, convenient to operate and carry.RED/GREEN Light LCD Display: can read the testing result clearly.Wide AC Voltage Range: can test voltage in 12V~1000V or 48V~1000V.2 Alarm Modes: sound or light alarm.Live Wire and Null Line Type: green light for neutral wire; red light for live wire.Signal Intensity Indication: the sound from slow to fast; the backlight from green to red; the bargraph from low to high.Adjustable sensitivity from low to hign.LED Flashlight: can use at night or dark environment conveniently.Auto power off: it'll power off in 3 minutes if there's no operation.Widely used in the investigation of industrial power and home line. Specifications:Brand Name: WinAPEXColor: BlackMaterial: ABS Display: BargraphAC Voltage Range: 12V~1000V(High Sensitivity) / 48V~1000V(Low Sensitivity)Frequency: 50/60HzAlarm Mode: Sound and Light Live Wire and Null Line Type: green light for null line; red light for live wireAuto Power Off: 3minLow Battery Indication: YesSafety Level: EN61010-1, -2-030; EN61326-1, CAT III 1000V Power Supply: 2 * 1.5V AAA Batteries(Not Included)Item Size: Approx. 15.6 * 2 * 2cm / 6.14 * 0.79 * 0.79inItem Weight: Approx. 32g / 1.13ozPackage Size: Approx. 16.1 * 3.3 * 2.8cm / 6.34 * 1.30 * 1.10inPackage Weight: Approx. 46g / 1.62ozPackage List:1 * Voltage Tester1 * User Manual(English)