The Taparia 130 mm Tester is a compact and reliable tool used for detecting the presence of voltage in electrical circuits. It functions as a voltage tester, often referred to as a test pencil or test screwdriver, and is primarily used for identifying live wires and checking the presence of AC voltage, typically up to 250 volts. The tester features a chrome-plated blade for durability and corrosion resistance, along with a transparent plastic handle that houses a neon bulb. When the metal tip of the tester is placed on a conductor or terminal and the metal cap at the end is touched with a finger, the bulb lights up if voltage is present. This provides a quick and simple way to verify electrical connectivity. While it's a handy tool for basic household use, it should not be used for high-voltage industrial applications or as a substitute for more advanced testing equipment like a multimeter.