This product is mainly designed for people with insomnia or people who are sensitive to sound. The demand for high-fidelity sleep aid sound source is realized through Bluetooth connection. This product has the following four characteristics: 1. A sleep aid control method and a Bluetooth wireless transmitter with built-in sleep aid audio provided by this product belong to the field of sleep aid equipment. When using this product, users can prevent the interference caused by the external sound to others around them; at the same time, through the use of Bluetooth devices such as TWS, users can get rid of the limitation of "wired", which greatly improves the user experience; further, it can also Isolate external noise; to achieve a relaxing sleep. 2. Portable design. Compared with other white noise products, this product is light and compact, easy to carry, suitable for use in various occasions (such as planes, trains, cars, offices, bedrooms, etc.). 3. This product has 20 kinds of high-quality sleep aid audio, and SNR≦119dB, THD<0.00006%, can create a quiet environment and help the elderly sleep better in a quiet environment. Help workers relieve stress at work and help avoid other environmental noise effects during yoga or travel. Ergonomic design, large button design on the front, easy to press and use, and the CD pattern shows the grade of the product.