Item Type: Anti Snoring Device Material: ABSWeight: Approx. 81g/2.86ozSize: 50x12x20mm/1.97x0.47x0.79inRated Voltage: 3.7VBattery: Lithium battery 600mah (shipped with built in battery)stopping .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Promotes Restful Sleep: Sleep machines mainly help people with insufficient sleep and poor psychological quality to fall asleep as soon as possible. At the same time, it has the function of relieving migraine, relieving anxiety and releasing pressure. 2Oval Shape and Round Button: The use of simple oval design and frosted texture in line with the human hand grip, which is simple and comfortable. Round button design for one key to turn on and adjust the power. 3USB Charging: It can be connected to computer USB port, portable power source, etc. Battery has long battery life. When using this product, please stimulate your hands properly, so that your hands and brain can synchronously relieve anxiety. 4Lightweight and Portable: This device is light weight and can be used for sports and walking. It can be worn anywhere and anytime to get rid of insomnia and anxiety. It is small but powerful. 5Relax Yourself: Wear this sleep device in your office or study area to help you focus on what's important and get your work done efficiently. It can stimulate the cerebral cortex, regulate emotions, calm emotions.