Features 1、Sensing Range: The AC voltage detector pen has a sensing range of 90V‑1000V AC for accurate voltage measurement. 2、Quick Test: When the tip lights up red and the device beeps when there is voltage, electricians, maintenance, service, security personnel and homeowners can quickly test active circuits at their workplace or at home. 3、Pen Clip Design:Voltage tester pen is designed with a pen clip, which is convenient for you to carry around and use, lightweight and portable. 4、Easy to Use: Just touch the terminal block, plug or power cord with the tip, simple operation, will not cost you too much time. 5、Application: AC voltage tester pen is ideally designed for testing power cables, circuit breakers, wall outlets, junction boxes, fuses, etc. Specification Item Type: Voltage Tester Material: PC, LED Size: Approx. 15.2 x 1.7cm / 6.0 x 0.7in Product Color: Yellow and Black Sensing Range: 90V-1000V AC Power Supply: 1.5V AAA Battery x2 (Without Battery) Package List 1 x Voltage Tester (Without Battery)