Time Timer: Proven for 25 years to be a globally recognized time management resource. Designed to show the passage of time using the signature colored disk. As time elapses, the colored disk disappears in a graphic, clear way ? making common routines at work, school, and home stress-free and enjoyable. The Time Timer PLUS 60 Minute is a versatile 1-hour visual timer for time management needs and people of all abilities, including kids and adults with Autism / ADHD. This desktop timer for kids and professionals is a must-have tool for monitoring screen time, studying for an upcoming test, silent reading, group projects or team building exercises, workshops or managing a long meeting. Easy to use: Turn the center knob on the front of the timer counter-clockwise until you reach your chosen amount of time (up to 60-minutes). Immediately, your new timer will begin to countdown, and a quick glance will reveal the time left thanks to the brightly colored disk and large, easy-to-read numbers. No ticking- no distractions! Use the volume-control dial on the back of the timer to control the audio alert (may be silenced for sound-sensitive environments). The Time Timer PLUS battery compartment is securely closed by a small screw in adherence with Consumer Product Safety Improvement Act (CPSIA) standards.