It’s become more popular with limited space in vehicles to have gauges support more than one readout on a single gauge to save space. In this gauges is they also monitor volts, the gauges have the ability to set a warning for volts as well, so in reality they are more like a 3in1 gauge.
It is also possible to have the gauges display Volts as numeric and EGT on the scale if you ever wanted to do just a quick check of your volts readout.
EGT Readout 0-1000C Boost Readout 30inhg to 99 PSI Volts Readout Configurable Warnings For EGT, Boost, Volts Peak Values For EGT, Boost, Volts 10-Colour Selectable LCD 3 Selectable Opening & Closing Ceremonies Boost Readout Type Selection (BAR or PSI) Display Modes / EGT + Boost / EGT Only Three EGT Scale Type Selections Boost Sensor Calibration
IN THE BOX 52mm Edge Dual 2in1 Boost + EGT Gauge 52mm Gauge Pod U-Bracket Pillar Mounting Kit 3M 1/8 NPT Multi-Core EGT Sensor 2.5M 99 PSI 3-Wire Boost Sensor 1M Remote Button Controller 1.5M Power Cable 20cm Power Link Cable 30cm Vacuum Hose Plastic T-Piece