A non-contact voltage tester serves as a key component in any electrical toolkit, allowing the user to verify the presence of AC voltage prior to working on an electrical installation or during troubleshooting without requiring physical contact with live electrical conductors. The Gardner Bender GVD-3504 Circuit Alert non-contact voltage tester features both audible (beeping) and visual (360 deg flashing red light) indicators to alert the user of the presence of AC voltage from 50 to 600 V. Use to locate breaks in wires and voltage at outlets, circuit breaker panels, light fixtures, switches and motors. Quickly locates the hot terminals in receptacles. Fully insulated probe tip eliminates the risk of contacting live electrical wires. Built-in patented safe test feature ensures tester and batteries are working properly. The unit includes a pocket-clip for secure portability.