1. Lightweight and CompactThis sensitive electrical tester pen, equipped with a spring wire, is a 3 24V test meter. The compact design makes it reach into tight spots easily and enhances flexibility of the testing range. 2. Precision and DurabilityOur tester pen features a spring wire, with an anti breakage protection. The black spring cord cover safeguards the wire, ensuring durability, while the LED digital display aids in accurate reading of the voltage number. 3. PortableOur electrical tester pen with a coiled spring wire is smaller and lighter than other probes, making it easy to carry without occupying much space in the toolbox or any other storage area. 4. User friendly DesignOur electrical tester pen boasts an ergonomic handle and a metal clip, ensuring a firm grip on the positive line and preventing it from loosening. The design also features line protection for added safety during operation.