Features: high quality Relief and stylish: sleep aid machine for adults is simple design, new matte texture, in line with the design of human hand grip, simple light and comfortable gifts. round button design, one for key to turn on, adjust power. easy to fall deep sleep every day and take off vagus nerve stimulator. The latest sleep too, this sleep aid device mainly helps people with insufficient sleep and poor psychological quality to fall asleep as soon as possible. at the same for time, it only takes 20 minutes to make you more relaxed and has the functions of relieving migraines, relieving anxiety, and releasing stress. Gifts design: light weight calming device, easy to use, can be used for sports, walking, can be worn no for time limited , anywhere, so you can get relief insomnia headache pressure and anxiety device. can be used in any need. Not only for sleep: sleep aid device can also stimulate the cerebral cortex, regulate emotions and calm emotions. wearing sleep aid device used in the office or study area can help you for focus on important matters and get the job done efficiently. Headache relief device easy to use: the sleep instrument can be connected to the computer USB port, mobile power, power supply, etc. long battery life. what a great mother's day gift. when using the device, please stimulate your hands appropriately so that your hands and brain can relieve headache pressure anxiety pressure. Specifications: Material:ABS+Stainless Steel Battery capacity:500mAh Input Voltage:DC 5V/1A Working Power:0.5W Charging Time:1.5H Charging Port: Micro USB Color:Blue/Gray/Orange Optional Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item. Package includes: 1 Piece Host 1 Piece Silicone Lanyard 1 Piece USB Data Cable 1 Piece Chinese and English Manual