Gardner Bender Sperry Dual Check GFI Tester is a versatile dual-ended tool that combines two essential testers into one compact device. On one end, it features a GFCI outlet tester that provides a clear and easy-to-understand single LED readout to indicate correct wiring or common wiring errors such as open ground, open neutral, HOT/GND reverse, HOT/NEU reverse, and open hot wiring. On the other end, it a non-contact voltage tester that detects AC voltage from 50 to 1000 volts with both a bright 360-degree LED visual indicator and an audible beep to alert the presence of voltage. This tester is designed for durability on the jobsite with a high-impact ABS housing that can withstand a 250-pound crush rating and drops up to 10 feet. Over-molded grips ensure comfort during repeated or prolonged use, and its compact design saves space. The Gardner Bender Sperry Dual Check GFI Tester is UL listed and backed by a lifetime warranty, making it a reliable choice for accurate analysis of any 120-volt receptacle. Model Number: VD7504GFI