Touch the wire with the pen tip. If the red indicator lights up, it means voltage exists. Detects voltage without metallic contact Voltage Sensitivity: 90~1000V AC (never test the voltage which is more than 1000AC). This voltage detector is a good investment for all electricians, technicians, and hobbyists. The tester is equipped with an audible alarm, which will alert you of the presence of voltage in the line, thereby keeping you safe from electrocuting yourself. All you have to do is touch the two wires together and test for an electrical current. If electricity is flowing, the red light on the tester will turn on and a loud buzzer will sound as well. There are four indicator lights on this tester, one for each of the four ranges described above (90-1000V AC). By touching one wire to another, you can test for voltage within that range. For example, if you touch one wire to another and the red light flashes and beeps between 90-200V AC, then it means electricity is flowing between the two wires at around 190V. With the help of this handy tool you can check whether there is electricity running through any exposed wiring in your home or office.

Electronic testers have automatic circuitry to prevent accidental shocks while they're turned on, but they can detect voltage without making physical contact with anything. This makes them safer and more convenient than their analog counterparts. They're also relatively cheap and easy to use, so even though you may already have something similar in your toolbox or junk drawer, it might be worth upgrading to an electronic one for some situations.

Features:-

• High-quality pocket-sized voltage detector.
• Upon detection, the tip glows and the buzzer sounds.
• With a super bright LED light.
• Pen shape, mini size, easy to use, and portable.