Describe Sleep training: This alarm clock is set to change the lights for 45 minutes. In the morning, the lights are gradually turned on to remind, and the lights are turned off to get up; at night, the lights are gradually dimmed, and the lights are turned off to sleep. Help to develop children's concept of time and habits. Night watchman: You can set the time, the light will gradually dim, and when the set time is reached, the light will be automatically turned off, so that people who are afraid of the dark can sleep peacefully. Voice wake-up: During 18:00-7:00, the alarm clock is in the voice wake-up stage. The light goes out after 20s, which is convenient for waking up at night to drink water and breastfeed. Intimate wake-up: The alarm clock can be set to two sets of alarms, which are separated on weekdays and weekends, allowing you to sleep peacefully on weekends. Funny ringtones: The alarm clock can be selected from 6 groups of ringtones, you can adjust it according to your personal habits, there will be your favorite ringtones. Product Description: Color: green Waterproof: none Size: 3 inches Thickness: below 3mm Shell material: ABS mirror Material: ordinary glass mirror dial Material: PVC