This circuit tester is the perfect tool to quickly test for voltage in GFCI receptacles. It is made by Ideal, a trusted brand in the industry, and has a model number of IDEAL 61-502. The tester is designed for electric measuring technology and has an LED indicator for easy use. It is made of durable plastic and measures 3 inches in length. The tester is black in color and works with 120-volt AC. It is a great addition to any tool set for those who work with electrical systems and want to ensure safety.