Description: What are the two ways that bone conduction sound waves are transmitted to the inner ear: sound waves directly pass through the skull to cause the perilymph to fluctuate accordingly, which stimulates the inner ear lymph fluid-helix-auditory nerve-cerebral cortex hearing. Usually people do not need to use their own skull to go. Feel the sound, but when the pathology of the middle ear hinders the transmission of sound waves, bone conduction can be used to compensate for hearing.Bone conduction technology is suitable for any pillow: the music box, just place it under the pillow and open it to enjoy it, no need to wear it into the ear, and it will not hurt if it is used for a long time.Bluetooth 5.0 chip: innovatively adopt the new Bluetooth 5.0 chip, compatible with mainstream APP, CVC digital noise reduction automatically connects to the mobile phone, and effective connection within 10 meters. One-key control: more convenient, Type-C interface, plug and charging.Powerful power: 20 hours of music playback, built-in 400mAh battery, strong battery life, 20 hours of continuous music playback under full power, 300 hours of standby battery life, accompany you all night to sleep peacefully.No ear damage and no burden: The sleep aid bone conduction music box can be enjoyed by just placing it under the pillow and opening it. White noise music accompanies you to sleep, easy to fall asleep and fall in love with sleep. Specification: Bluetooth: 5.0 Charging voltage: 5V 400mA Working voltage: 3.7-4.2V Interface type: TyPe-C Size Chart: Approx. 15.5x1.2x3.6cm/6.10x0.47x1.42inch Package Includes: