This combo tester lets you test simultaneously and independently test both feet and a wrist strap while filtering out human body noise. Features the “Near-Fail” indicator that alerts the user that the ESD grounding device under test (wrist strap or heel grounder) is nearing failure levels and should be changed soon if not right away. This helps prevents a worn device "passing" a test and failing in the field. With the digital readout, the user will know how worn a device is. This tester fully supports the “Compliance Verification Plan” requirements as stated in the ANSI ESD S20.20.