Portable pen-shaped AC phase and voltage detector can measure phase sequence and detect AC voltage in 12V～ 1000V and 48V～1000V,has non-contact safety design, adjustable sensitivity,sound and light alarm, LED lighting, easy operation,and high accuracy, which is a professional device for electricians and industrial electricians to handle wiring and wiring. Functions: High/Low Sensitivity NCV Adjustable: AC Voltage Range Dual Sensitivity 12V 12V 1000V and 48V～ 1000V with S Button Switching. AC Voltage Detection: Detect AC voltage by touching the power outlet or approaching the live wire with a non-contact tip. NCV phase sequence detection: designed with phase sequence measurement function. LED lighting: with flashlight for additional lighting of the workplace, convenient to use at night or in a dark corner. Other functions: breakpoint checking, high voltage circuit alarm function, live wire measurement and full wire measurement. Automatic shutdown: automatically turns off when not working and does not detect AC voltage after 3 minutes. Power supply: only powered by 2 AAA batteries, with low battery indication and easy to install batteries. Technical data: Material: ABS Dual AC voltage range: 12V 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 Compliance with safety requirements: CAT.IV 600 V CAT.III 1000 V. Operating temperature: 0~40℃ Storage temperature: -10~50℃ Humidity: ≤95% Height: ≤2000m Power supply: 2 * 1,5 V AAA battery (NOT included) Product Size: 158*24*20mm/6,22*0,94*0,79inch Product Weight: 32 g / 1,17 oz Package Weight: 52 g / 1,85 oz Package Size: 16,5 * 3,5 * 3 cm / 6,50 * 1,38 * 1,18 inch List of things to pack: 1 * Voltage Tester 1 * Manual (English)