AEM's OBDII CAN Plug & Play Adapter Harness make CD Dashes the perfect racing displays for track day enthusiasts who want to be able to see engine and vehicle data but are still running a factory ECU. This is especially true when a CD-5 Carbon or CD-7 Digital Dash and OBDII CAN PNP Adapter Harness are combined with the Vehicle Dynamics Module to add GPS, 3-axis accelerometer and 3-axis gyroscope for track mapping and lap times, and critical vehicle dynamics data including G-loads, roll, pitch and yaw. And for CD Dash owners with CAN OBD-II who are already using the dash and receiving channels from a data logger or other CAN-enabled device, you can now add additional channels through the OBD connection with no additional wiring! Once the OBD-II CAN Sub Harness is connected, the dash polls the vehicle's CAN bus to see what channels are available and what speed they are being delivered. Users can then select the channels they want to add to the display, set alarms for available channels and log them if using a CD logging dash. Although the CD Dashes cannot control the data rate that available channels are transmitted (since this is determined by the vehicle manufacturer), users can prioritize channels to optimize them for the best available transfer speed