Mastech MS2002A Auto Ranging Digital Clamp on Meter 400A AC Current +Tekpower Line Splitter with Back Light and Data Hold (MS2002A+M920) MS2002A Clamp Meter measres 400A Current with Back light with Tekpower M920 Line Splitter Data hold With Back Light Low battery indication 3 1/2 digits LCD with a max reading of 1999 90 days money back guarantee and 1 year limited warranty