1. 303+, Used for professional rallying & racing.
2. Rally computers feature the latest state-of-the-art LCD back lit display which is easily read in all lighting conditions and viewing    angles.
3. A non-volatile memory remembers your factors, mileage's, log entry, and customized setup even when itis removed from the car     for extended periods.
4. The computer will operate either with or without its drivers display attached.
5. Operates in Miles or Kilometers, and displays distance in increments of .01 or .001. Time may be displayed and computed in your     choice of seconds, hundredths, or thousandths of a minute.
6. User friendly.