AM Ammeter Model:RP-1 RP-2 RP-4 Class;1.5 Specs:0.1A 0.5A 1.5A 3A 5A 7.5A 10A 15A 20A 30A 50A 75-105A(use Ext5A) Note:for 60/75/100A direct meter,the class is 2.5 Advantage:The scale can be easily changed without opening the front frame so that the class will not be influenced.