AEM X-Series Boost Pressure -30inHg 35psi GaugeX Series Digital Gauges include new technological features that make them easier to use. Two buttons on the faceplate deliver programmability for peak recall, standard or metric center LED readout and sweeping LED needle, and user selectable threshold warnings. The gauges are AEMnet CAN bus enabled, so they can be daisy chained together for use with the Infinity ECU, Series 2 EMS, AQ 1 Data Logger, or 3rd party EMS or logger that accepts AEMnet. 0 5V