Feature 1、Safe and Practical: The non contact AC voltage detector only needs to place the tip near the wiring board, socket, or power cord. When the pen tip emits a red light and the pen beeps, you know there is voltage present, safe and reliable. 2、Multi Functional: Has a flashlight to help you work better in the dark. When AC voltage is detected, the detection light will flash red and the buzzer will emit a brief beep sound. 3、Compact Design: Durable ABS casing, perfect portable pencil hook and convenient pocket clip, fashionable design and bright orange color, perfect for breakpoint testing. The convenient circuit tester is for electricians and homeowners. 4、Other Functions: Neutral and live line recognition, sound and light alarm, line breakpoint testing, high and low sensitivity switching, NCV sensing. 5、Simple Carrying: Comes with a compact size and a light weight as well, the volt tester pen is very convenient to carry with you. Item Type: AC Voltage Detector Model: UA31B Material: ABS Power Supply: 2 x AAA 1.5V battery, shipped without battery. Use: For Electric Testing AC Voltage: 12-1000V, 50/60Hz Working Temperature: 0-40℃ Storage Temperature: -10~50℃. Humidity: ≤ 95% Altitude: ≤ 2000 meters Safety Level: CAT-III 1000V CAT-IV600V Package List 1 x AC Voltage Detector Note Only suitable for detecting voltages between AC110‑380.V