Don't disturb others:Solid sound transmission, using the pillow as a generating medium to enjoy music alone, without affecting others. Compact and does not take up much space:Bone conduction bluetooth sleep speaker silicone cushion face down, after the power on, just place it under the pillow to enjoy the music and improve the quality of sleep. Built-in white noise:White noise environment calms the brain nerves and releases stress to help you fall asleep. Bluetooth 5.1 low power consumption:Adopting imported chip, equipped with high performance chip, fast response and stronger anti-interference. Light weight:About 40g lightweight design, flat shape, placed under the pillow without a sense of foreign body, senseless sleep.<br><br>Long battery life:400MAH rechargeable polymer battery, full charge in 40 minutes, 30 hours of continuous playback. Timer shutdown:Double-click the M button to turn on the timer shutdown, no need to get up and operate, a sleep until dawn. Product Parameters: Name: under the pillow bone conduction bluetooth speaker Bluetooth version: 5.1 Function: bluetooth playback, TF card playback, timer shutdown, white noise. Weight: 40g Colour:Black Material:plastic<br><br>Package Contents: 1 * Sleep Aid<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.