For a good sleep you will have to pay 50 dollars (2 photos + video)

Lately we often hear that people cannot sleep - and sleep is the most important part of our lives. Therefore, you need not only to ventilate the room and have a good mattress, but also to get this gadget for $50: this is a mini-speaker “Banala Sleep Dot” that makes isochronous sounds. They help relax the brain, fall asleep faster and fall into deep sleep, which is confirmed by research.