The Kewtech KT63 5-in-1 Multifunction Tester is a reliable and advanced tool designed for measuring AC voltage with a measurement category of CAT I. This tester also offers protection against splashing water with an IP54 rating and is dust protected. It features a digital display, fused current (A) terminal, and convenient battery door access for added versatility and ease of use. The recent calibration certificate ensures accurate and trustworthy results for efficient testing and inspection in a variety of industrial and business settings. Calibration certificate included was done about 2 months ago