The Davis CarChip Fleet Pro system provides a way for businesses to monitor vehicle performance and the driving behavior of employees. Plug the tiny data logger into the vehicle's on-board diagnostics port and begin recording trip details immediately. Engine performance monitoring helps to keep vehicles in top condition with features such as diagnostic trouble codes and freeze-frame sensor readings. The system stores up to 1,200 hours of driving data. To monitor engine performance, use a CarChip Fleet Pro in each vehicle. To monitor driver performance, simply issue each driver his or her own CarChip and ID number. Drivers can quickly and easily take their CarChip with them from one vehicle to the next.