has proven for 25 years to be a globally recognized management resource for kids and adults. The learning is designed to show the passage of using the signature red disk. As elapses, the red disk disappears clockwise in a clear, visual way making daily routines stress-free and enjoyable at home, school and work. The optional alert (on/off) on the back of the controls the sound at the end of the timing cycle. Turn the center knob on the front of the visual counterclockwise until you reach your chosen interval (up to 60 minutes). The MOD Home Edition is the ideal 60-minute visual for all abilities and ages, including kids and adults with autism or ADHD. Personalize your desk , homework , kitchen , school or work . Express your unique personality with the 4 different available silicone case colors sold separately (additional colors sold as 4-pack)