The miniature digital clamp meter testboy tv 218 is equipped with a data hold function and an large lcd display with 3 34 digits it measures acdc in two measurement ranges 40a and 200a the true rms function provides accurate resultsthe testboy tv 218 is a small and lightweight clip on ammeter becasue of its small size it can also be used in confined spaces the data hold feature allows the reading in the display hold the auto power off function ensures automatic shutdown when