Description: 3-bit 0.28 inch LED DC 7-100V 0-20A dual display voltage and current meter with 30A terminal block. Self-contained splitter/shunt, no need to connect external external flow for convenient testing. Adopt 30A high current terminal block, large contact area of live block, reliable and safe. The meter must measure the current in series with the negative pole of the load, otherwise it will burn out the IC. Widely used in battery charge and discharge control, automotive battery control, electric vehicle power supply control, DC motor control and over-voltage over-limit protection. Specification: Voltage Testing Range: DC 7-100V Current Testing Range: 0-20A Error: 1% Resolution: 0.01A Working Current: 15mA Display Color Red Blue Display Screen: LED Nixie tube, 3 bit, 0.28 inch Size(L*W*H): 48x29x43mm/1.88x1.14x1.69 inch Hole Size: 46x27mm/1.81x1.06 inch Package Includes: 1 piece voltage&current meter( Red) 1 piece voltage&current meter( Blue)