APSX B2 Digital Vacuum/Boost Display Gauge (Blue) Bright 3-digit LED Display (Blue) to show boost in 0.1 PSI (60 PSI max) and to display vacuum in 1 In.Hg (-30 In.Hg max) increments Sweeping RED LED "needle" boost indicator from o to up to 60 PSI (10 PSI and 30 PSI are other options) and single BLUE LED vacuum light Pre-assembled plug and play cable harness with built-in sensor on the gauge Multiple outputs for digital (to PC) and 0-5V analog (to data logger / EMS)