[Features] Working Principle: Snoring sound is automatically and accurately detected by high precision sensors, and hypoglossal nerve and mandibular muscles are massaged through vibration pulses of different frequencies to promote muscle tightening and regulate breathing rhythm. Multiple Uses: Anti Snoring device is can be used high speed rail, airplanes, offices, long distance rides ,ect. You can also send friends as a present so that they can also enjoy the fun of technology. Ergonomic Design: Ergonomically designed for a high level of comfort, you wear and use the product correctly according to our guidelines. Persistent Use: You wear it for 23 weeks, the breathing will be smooth when sleeping, and the number of snoring will be greatly reduced. Smart Snore Stopper: Snoring can be accurately recognized, devide will help to gradually reduce snoring symptoms and improve your sleep quality. [product information] product name:Snoring cessation device sleep device color:black Material:ABS+PC Packing list (you can get after purchasing one item): Snoring cessation device sleep device * 1 Please understand: 1.Due to the long shipping time, the item may be damaged during the shipping process, if the item is damaged, please leave us a message through the official website immediately before posting comments, and I will solve the problem for you. 2.Due to manual measurement, the size may have an error of 1-3cm. 3.Colors may vary from monitor to monitor.