The TASI TA10 Series Non-Contact Voltage Tester Pen includes two compact electrical testing tools, TA11B+ and TA13A, also known as non-contact voltage detectors, NCV testers, voltage sensing pens, electrical test pens, AC voltage detectors, and electrician inspection tools. Equipped with advanced NCV (Non-Contact Voltage Detection) technology, these testers can detect AC voltage without stripping wires or making direct contact with live conductors, improving safety and efficiency during electrical inspection. The TA10 Series supports 12~1000V AC voltage detection with adjustable high and low sensitivity modes, allowing electricians to quickly locate electrical fields from a distance or accurately identify live wires at close range. Featuring a digital display, audible and visual alarms, LED flashlight, low battery indication, and automatic power-off function, the tester provides clear and reliable electrical inspection results. The TA11B+ model is designed for basic non-contact voltage detection and live/neutral wire identification, while the TA13A adds a three-phase phase sequence testing function for checking three-phase power systems, motors, control cabinets, and industrial electrical equipment. With its compact pen-style design, high safety protection, and easy operation, the TA10 Series Non-Contact Voltage Tester is widely used in home electrical installation, building maintenance, facility management, industrial electrical inspection, factory power distribution maintenance, automation equipment servicing, HVAC electrical troubleshooting, construction projects, fire protection system inspection, and professional electrician applications. It is an essential handheld electrical safety tester for electricians, technicians, maintenance engineers, and installation professionals.