Amprobe BT-250/KIT is a high voltage breaker tracer and socket tester kit. The kit includes the BT-250 breaker finder and the ST-102B receptacle tester with ground fault circuit interrupter (GFCI). The BT-250 breaker finder is designed to quickly and easily identify breakers on energized systems. The microprocessor-controlled design provides extremely accurate readings to find the correct breaker location. The ST-102B can quickly test sockets and confirm the wiring and operation of AC outlets and confirm that GFCI breakers are properly wired for protection. The Amprobe BT-250/KIT is designed for residential and commercial electricians and DIYs.