The AEMC 6470-B KIT-300FT is a 300-foot kit that includes a 6470-B clamp-on ammeter, a carrying case, and a set of test leads. The 6470-B clamp-on ammeter is a versatile tool that can be used to measure AC and DC current, as well as voltage and resistance. The carrying case and test leads make it easy to transport and use the ammeter.