My Sleep Clock (power adapter sold separately) My Tot Clock has a new little brother...My Sleep Clock! It includes several of the best features at a lower cost! Lullabies, Wake Music, and White Noise stored on My Sleep Clock (no separate Tot Clock Treasure is required). Runs on AC Power or 4 AA Batteries (power adapter and batteries sold separately). Energy-Saver feature extends battery life up to 1 month. Includes a Weekend WakeTime Feature (different wake times for weekdays and weekends) Changeable Faceplates make My Sleep Clock even more fun for tiny tots! Match My Tot Clock to your child's interests or bedroom theme! Ships with the Moon & Stars faceplate. Other fun faceplate designs sold separately, including Princess, Dora the Explorer, Teenage Mutant Ninja Turtles, and Dinosaur Train!