Function: 1. Promotes restful sleep: Sleeping machines mainly help people with insufficient sleep and poor mental quality fall asleep as soon as possible. At the same time, it has the function of relieving migraines, relieving anxiety and releasing pressure. 2. Oval shape and round button: the use of simple oval shape and matte texture according to human hand grip, which is simple and comfortable. Round button for one key to turn on and adjust power. 3. USB Charging: It can be connected to your computer's USB port, portable power source, etc. The battery has a long service life. When using this product, you should properly stimulate your hands so that your hands and brain can synchronously relieve anxiety. 4. Lightweight and portable: This device is lightweight and can be used for sports and walks. It can be worn anywhere, anytime to get rid of insomnia and anxiety. It's small, but powerful. 5. Relax: Wear this sleeping device in your office or study area to help you focus on what matters and get the job done efficiently. It can stimulate the cerebral cortex, regulate emotions, calm emotions. Specification: Item Type: Anti-Snoring Device Material: ABS Weight: approx. 81 g/2,86 oz Size: 50x12x20mm/1.97x0.47x0.79in Rated voltage: 3,7 V Battery: 600mah lithium battery (supplied with built-in battery) stop List of packages: 1 x Anti-Snoring Device 1 x Power Cable 1 x English Manual 1. Press and hold the power button for 2 seconds to turn on the device. 2. Press the power button to adjust the force. 3. The default power level is 1 and a total of 6 cycles are selected. 4. During the working period, the blue indicator is always on. 5. The blue light flashes during the charging process, and the blue light shines with continuous light when charged.