The Big Red Rooster Sleep Training Alarm Clock teaches children to stay in bed longer, so parents can sleep. No more 5 AM wake up calls. The clock is perfect for children ages 2 to 7 years old. Children will learn to stay in bed when the light is red and know that they can get out of bed when the light is green. The 2 alarms are perfect for a weekday alarm time and a weekend alarm time. The nap timer can be set for 1 minute to 12 hours. There is a hidden parent compartment, so children cannot change the settings or turn the alarm off early. Instructions are printed inside the parent compartment. The buzzer sound can be turned off, so only the green light turns on at the alarm time or at the end of the nap timer. This is perfect if you want your child to wake up on their own. The brightness of the ball can be set to: 0percent (OFF), 25percent, 50percent, 75percent, 100percent brightness. The green light duration can be set to: 0:15, 0:30, 1:00, 1:30, 2:00. The clock is powered by an AC adaptor (included) or 3 AA batteries (not included). The AC adaptor cord length is 5 ft. long. Product dimensions: 5.25 in. D x 5.38 in. W x 7.75 in. H. Gender: unisex.