Designed for use with the AEM EMS, the Serial Datastream gauge is 19 gauges in 1! It has the ability to read 19 channels simultaneously to provide reference for all outputs, including boost, AFR, EGT, H2O, IAT, knock, volts, RPM, vehicle speed, and more! Since it can read all channels at once, AEM's Serial Gauge eliminates the need to buy a cluster of gauges, or you can link multiple Serial Gauges together to monitor additional channels or to divide your readouts across a few gauges.