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 x 1,5 V AAA battery (NOT included) Product Size: 158 x 24 x 20mm/6,22 x 0,94 x 0,79inch Product Weight: 32 g / 1,17 oz Package Weight: 52 g / 1,85 oz Package Size: 16,5 x 3,5 x 3 cm / 6,50 x 1,38 x 1,18 inch List of things to pack: 1 x Voltage Tester 1 x Manual (English)