There are 2 types of audio devices that you can choose from, one has sleep sensor and non-stop system, while the other does not have these additional features.

The first audio device is a standard audio device that plays white noise for 1 hour. This audio device is good to use if the child only has trouble falling asleep when the child is going to sleep.

The second audio device is also good for children who are having trouble falling asleep. But it is also good to have for when the child wakes up a lot (eg at night). There are 2 modes that you can choose to use: Sleep Mode and Non-Stop Mode .

Sleep Mode: When the audio device is set to sleep mode (the sleep sensor is used), the audio device will emit white noise for 1 hour before the sound gradually disappears. After switching off (after 1 hour), if noise or other sounds occur around the audio device (which is in sleep mode), the audio device resumes and emits white noise before it turns itself off after a few minutes. And so it will hold on: noise around the teddy bear appears and the audio device is reactivated and then turn off after a few minutes. And so it will last: noise around the bams occurs and the audio device is reactivated so as to turn off after a few minutes.

Non-Stop Mode: When the audio device is set to non-stop mode, the audio device will emit white noise for 12 hours.