Automatic on-board recording device
Automatic on-board recording device means an electric, electronic, electromechanical, or mechanical device capable of recording driver's duty status information accurately and automatically as required by 395.15. The device must be integrally synchronized with specific operations of the commercial motor vehicle in which it is installed. At a minimum, the device must record engine use, road speed, miles driven, the date, and time of day.
49 CFR § 395.2
As used in this part, the following words and terms are construed to mean: