The SCS 770030 Combo Tester is a versatile device designed to ensure the proper functioning of operator wrist straps and footwear within ESD-controlled environments. It allows users to easily test both wrist straps and footwear, determining if they meet the required performance standards. The tester provides clear visual and audible indications of pass or fail results, and can also identify issues with grounding device resistance. It can be powered by a 9V battery or an external power adapter, offering flexibility in installation and use. The Combo Tester is calibrated to NIST standards and is a critical component of any ESD compliance program.