... digital display tube, suitable for most cases applications.Design for 20 A current, support external shunt,maximum current unlimited expansion.VAM9020:10 ... V-90 V (3 wire).Measuring current range: VAM9020:0 ~ 20 A.Mode of Voltage current display : 3 byte LED display.Display ... resolution: 0.01 V, 0.01 A and 0.01 W, 0.01 AH. Packet content:100 ...