Time Timer Plus 60 Minute Visual Analog Timer (Charcoal) Optional Alert (Volume Control Dial) No Loud Ticking; Time Management Tool 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 red-disk disappears in clockwise direction. Stands on desktop Quiet Operation - No loud ticking provides the silence and focus for group projects, school, homework, training and other activities. Ideal for special needs, children, parents, teachers, office staff / professionals, and students Audible alert - the volume-controlled alarm signal when time is up can be dialed up for a loud alert or down to silent for sound-sensitive environments Special Needs - Time Timer's discreet visual timing design helps encourage independence and productivity for those with disabilities or special needs such as autism or adhd One AA battery required (not included). Timer size: 5.5" x 7". Battery compartment is securely closed by a small screw to adhere to CPSIA standards