Smart key LCD display Real-time toe-in, camber display Level indicator.Battery percentage display.Battery status indicator.Low battery warning light.Radio signal status indicator.8Beam CCD infrared optical sensors with highest precision.Sensors made in.Adjustment indicator on sensor head.Calibration value backup in sensor heads.Modularized structure, Components replaceable without calibration. ZigBee wireless communication Technology.Professional high accuracy 6 Meter wheel base,8 toe sensors,fastest stable data transfer,24 inch clamps.Super large DataBank.