A wake-up clock is a special type of electronic alarm clock commonly used to help people gradually wake up from deep sleep, in order to reduce the panic and discomfort caused by sudden alarm sounds.

Wake up clocks have various working principles, some of which mainly use light and sound to gradually adjust people's sleep environment, guiding them from a sleep state to a waking state. Some wake-up clocks can also gradually stimulate people's senses through vibration and low light, allowing them to gradually adapt to the external environment while reducing the impact of sudden stimuli on the body.

In addition to traditional alarm clock functions, the wake-up clock also has some special functions. For example, some wake-up clocks can preset a program that gradually brightens the light, mimicking the intensity and changes of natural day light, gradually stimulating people's visual senses and helping them wake up from deep sleep. In addition, some wake-up clocks can gradually stimulate people's auditory senses through sound, music, or natural sounds, allowing them to transition from a sleep state to a waking state.

Overall, a wake-up clock is a practical electronic alarm clock that can help people gradually wake up from deep sleep and reduce the panic and discomfort caused by sudden alarm sounds.