The CDL audio study guide has a manual with a directory of topics and study questions for the CDL exam. Based on your CDL audio purchase, you can practice the study questions on-line or on CD rom.
The CDL audio study files can be download to your mp3 player or iPod. When using your music player, you can replay study sections or skip to different sections that you need to focus on.
The CDL audio study guide makes it easy for you to study at your own pace and set up a time schedule to meet your needs. When practicing the test questions, you will receive the answers instantly, which allows you focus on areas that need improvement.