Engineered with a robust ABS construction and an ergonomic penshaped design, this electric detection pen offers easy operation and calibrated precision for electrical system diagnostics. Ideal for enthusiasts, electricians, and professionals who require stable electric verification during installations, maintenance, or tasks. The B18 tester safely detects 12V–240V currents and provides audible and visual alerts through builtin buzzers and LED indicators for fast hazard warnings. This multifunctional electrical testing tool combines voltage detection, circuit continuity check, and breakpoint identification in a lightweight ABS pen design with a singlebutton operation. Use scenarios During wiring installations or upgrades, verify that circuits are deenergized and ready for work, using the device to confirm presence or absence of voltage quickly. For routine electrical maintenance, check circuit continuity and verify wiring integrity between components such as outlets, switches, and panels. While troubleshooting faults, use the tool to identify breakpoints and verify circuit continuity to narrow down faulty segments and confirm safe, accurate repairs.