HIGHLIGHTS: The MOD features a removable, silicone cover that offers an extra layer of protection from the bumps and falls that are part of everyday life. Portable and easy to use anywhere from your office/school desk, in-home learning center, playroom, or kitchen counter. Teacher's Choice Award for both the Classroom and Family.TIME MANAGEMENT - use this 60 minute analog countdown clock to stay on task, assists with organization and concentration. As time expires, the visible display of the reddisk disappears in clockwise direction. Desktop timer ideal for individual use or small groupsSPECIAL NEEDS: The visual design of the helps with anticipating transitions and encourages independence and productivity for all abilities, including those with Autism, ADHD, or other special needs both at home and at school.QUIET OPERATION: No loud ticking provides the silence and focus for school, homework, and other silent activities. Intuitive Assistive Tech - Ideal for special needs, children, parents, teachers, office staff / professionals, and students.PRODUCT DETAILS: The optional alarm signal when time is up can be turned off for sound-sensitive environments. One AA battery required (not included). Battery compartment is securely closed by a small screw to adhere to CPSIA standards. 3.6 in. x 3.6 in.