Features: 【Safe＆Highquality】Our tester pen is composed of highquality and Drop-proof insulation, ABS, 45 steel, which ensure the while using 【Self Check Function】In self-check before use, please hold the pen tip with one hand and the tail with the other hand.When the light is on, it means the tester pen is normal and has sufficient power. No light indicates that the battery needs to be replaced. 【Automatically Induction】As long as it is close to the insulation of the wire, the plastic of the electrical appliance, etc., when the light is on, it means that the line is live. The brighter the light, the higher the voltage of the tested circuit, and vice versa. 【Find Line Breakpoints】One hand touches the bottom of pen, and the tip of pen touches the wire. The breakpoint is where the light goes out. It is used to find breakpoints in daily household appliances such as rice cookers, computers, and plug-in boards, etc. Detection】Please the bottom of the pen with one hand, the positive terminal of the battery with the tip of the pen, and the negative terminal of the battery with the other hand. When the light is on, the battery is fully charged, and vice versa. 【Bright Light＆】The pen is designed with a bright LED light, which is also an obvious cue when used during the day. What’s more, it is , which allows you to work well outdoors. Product Description: 【Warm Tips】 The hand need to the bottom of the pen, that is, the position of the screw rod, otherwise it cannot be judged whether the line is live. When thepen touches the live linesocket, the light will be on, indicating that the line has power. When the pen touches the earth line socket, the light will not turn on. Because the is charged with electricity, slight shaking will also cause the pen to lighten slightly. SPECIFICATIONS: Measuring range: 70-250V Nib material: 45 steel material: ABS Include：1x Responsive Electrical Tester Pen NOTE Due to manual measurements, please allow slight measurement deviations. Crafted from premium materials for exceptional durability, ensuring long-lasting performance even with frequent use. Comfortable and pleasant to use experience, that provides a warm and inviting experience for everyday enjoyment. Versatile design suited for various applications, adapting effortlessly to your lifestyle and preferences. Stylish and elegant appearance that enhances the aesthetic of any space, contributing to a cozy and appealing ambiance. Affordable yet high-quality, making it an ideal choice for thoughtful gifts to friends and loved ones.