The Groclock uses colors and pictures to help children who are too young to read an ordinary clock, understand when it's time to sleep and when it's time to spring out of bed and play!Tells the time with colors and pictures: Perfect when sleep training toddlers, the easy-to-understand pictures help little ones understand when it's time to get up and when it's time to stay in bed.USB powered: Mains powered by a 3.5mm USB cable (1.8m length) and adaptor plug. The USB adaptor plug is not included but the cable is compatible with most USB plugs used as phone chargers.Adjustable brightness: The screen brightness can be turned down or turned off completely. Ideal as a nightlight for comfort and reassurance or for when your toddler needs a night-time toilet trip.Digital clock: The optional digital clock feature is ideal for when your little one starts to learn digital time.2-time settings and audible alarm: With 2 settings you can set different weekday, weekend, or naptime wake-up times and the optional audible alarm feature is perfect for routine wake-up times.Sustainable packaging: To help reduce our environmental impact, our Groclock sleep trainer is packaged in plastic-free and 100% fully recyclable cardboard packaging.