Premium Series (Green and White) 52mm (2 1/16") Stepper Motor driven 270° LED Display Fully programmable peak recall and warning feature all within the gauge. You are in control to set the warning limits where you want and have the gauge either flash or beep (Audible) or both when the gauge exceeds your pre-set limits. All Premium Series gauges perform both a start up and shut down ceremony and are blacked out when off. Remember no controller is needed, everything is built right into the gauge. Wire up the first gauge for power/ground and simply daisy chain any additional gauges using the supplied daisy chain harness. Less wires means less work for a faster install. Don't trust your factory gauges for important monitoring of engine functions. By the time your factory idiot light comes on the damage is already done. Monitor you engine functions with one quick glance and notice any problems before it is catastrophic. This gauges warns you once your Fuel pressure drops below your set limit. You are in control and program the gauge to warn you at any pressure you want. Also check the maximum pressure you attained with the peak recall function. (0-85 PSI Range: Includes Sender, mounting Cup, Visor/Hood, quick connect wiring Harness, Decal and Instructions) We also offer Free tech support by email or phone.