Customize your Timer's duration for several hours, minutes or seconds. Set your Timers to automatically repeat. Choose from four colors and 16 audible alarms! The Time Timer window can appear full-screen or float on top of other applications. It's total flexibility to manage your time. Every CD is Windows & Macintosh compatible. Useful for those with ADHD, FASD, Learning Disabilities, Special Needs, Autism/Asperger's, and Sensory Processing Disorders.