ITEM NAME:AC DC 12-250V Voltage Detector Sensor Tester Digital Electric Test Meter-Pen N Descriptio n Features: 100% brand new and high quality AC/DC Voltage Detector Tester. No need battery to drive. Economical and practical. Fast induction test. Durable and long service life. Contact AC/DC Voltage test: 12V to 250V Color : Black Length: Approx. 5.12inch / 13cm Voltage test Display: if the tested voltage doesn't reach 70% of higher voltage, it will display lower voltage. Breakpoint test: Keep the tip of tester 1-5 cm from the tested electric line, if an induction marking is found on the LCD, the tested line is firewire. Package included: 1× AC/DC Voltage Detector Tester Note:Â Please allow little size error due to manual measurement. High quality buy, happy buyï ¼ AC/DC Voltage Volt Detector Tester Non-Contact Electric Test Meter Pen 12-250V.Breakpoint test: Keep the tip of tester 1-5 cm from the tested electric line, if an induction marking is found on the LCD, the tested line is firewire. We want to make sure you are happy with our item.