Powered by digital microprocessor-controlled, rugged stepper motor drives & laboratory grade sending units, Full Sweep Electric Gauges are the BEST gauges available. They combine Extreme Durability & Readability of 270 degree sweep mechanical gauges w/ the Easy Installation & Safe Operation of short sweep electrics. Track Tested & Race Proven, these units use precision senders to keep hazardous fluids out of the driver compartment, and perform gauge calibration and sensor diagnostics at power up for Extreme Accuracy, every time. Most units compatible w/ Auto Meter Data Logger for the ultimate race info center.