This DataMonster monitors, displays, and data logs multiple vehicle OBDII parameters such as speed, EGT, AFR, RPM, and engine temp all with custom alerts. Display 2-8 values on screen at once or pair up to 4 iDash gauges together. In addition, the iDash calculates Banks proprietary and/or patented information such as Manifold Air Density, intercooler effectiveness, and more. The iDash can also be used in pre-OBD-II vehicles by utilizing Banks expansion modules. Key Features: Adds Data-Logging functionality (inc micro SD Card) Log up to 100 parameters at a time Log up to 20 min/max values Auto-Dimming Feature Customizable gauge display Display 2-8 values on screen Built-in Shift and RPM Light Connect multiple iDash gauges Over 300 parameters available Read up to 80 OBDII Mode 01 values View Data your dash does not display Read Boost Pressure, EGT and so much more Fits standard 52mm (2-1/16 inch) gauge mounts Includes patented OBDII Density (exclusive to Banks) Displays accurate values your OEM dash gauges filter Avoid costly repairs by monitoring important sensors CARB E.O. Not Required