Features: The B18 not Contact Voltage Tester safely detects 12V 240V current without physical contact, featuring hearable/visual alerts through build in buzzers and LED indicators for fast hazard warnings. This multifunctional electrical testing tool combines voltage detection, circuit continuity check, and breakpoints identification in a lightweight ABS pen design with one button operation. Ideal for DIY enthusiasts, electricians, and professional requiring reliable voltage verification during electrical installations, maintenance, or repair tasks. Perfect for troubleshooting live wire in homes workshops or industrial sites, ensuring safe diagnostics of outlets, switches, and appliances across residential/commercial environment. Engineered with strong ABS construction and ergonomic pen shaped design, this voltage detection pen delivers easy operation without calibration for precise electrical system diagnostics. Specifications: Material: ABS Voltage measurement ranges: 12-240v Length: about 19.2cm/7.56inch Width: about 3.3cm/1.3inch Battery: 1xAAA(Not included) Package Includes: 1xVoltage detectors Pen note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.