The Extech 480403 is a dual-function tester that verifies three-phase power sequence (ABC or ACB) and determines motor rotation direction—without direct motor contact. Designed for electricians and maintenance technicians, it ensures correct phase wiring before equipment startup, preventing motor damage from reverse rotation. Features include bright LEDs for live-phase indication, non-contact motor rotation detection, and rugged double-molded housing with color-coded alligator clips.