The Klein Tools Updated Digital Multimeter Lineup, Nos. MM325, MM420, MM450, and MM720, features a refreshed look and new capabilities. New capabilities include a more rugged industrial design with lead-alert protection and green LEDs to avoid blowing fuses on MM325, MM420, and MM450 models. They also feature a larger display, making it easier to read. The MM450 and MM720 employ a large, reverse-contrast display with an auto-optical sensor adjustment. All units come equipped with an easy-access fuse for quick changes, TRMS for improved accuracy on MM420, MM450, and MM720 models, and improved temperature accuracy. The MM450 has the same features as larger meters but with a slimmer profile.