Check the listing for details. The Chill Pill Device Hand Held Ergonomic Sleep Aid Machine Improve Sleep Relief. Condition: New with box. Listed at 15.99 USD. Specification:Name: SleeperMaterial: ABS+Stainless steelColor: blue, yellow, whiteBattery capacity: 500mAhInput voltage: DC 5V/1AWorking power: 0.5WCharging time: 1.5H full chargeDuration of use It will automatically shut down for a fixed period of 20 minutes, and it can be used approximately 40 times.Charging port Micro USB Improve concentration: Use a sleep aid in the office or study area to help you handle important tasks and complete work and study efficiently. Improve the motivation of study and work, improve the speed of falling asleep and sleep quality. Relieve anxiety: USB charging portable sleep aid machine can moderately relieve head fatigue, help you get rid of insomnia, anxiety, sleep problems, and help you get a good night's sleep. Eliminate palm fatigue and soreness, relax your mind and eliminate fatigue. Grip design: The smart sleep instrument conforms to the human grip design, which is simple, light and comfortable, and can sleep deeply after use. The sleep aid is more comfortable to hold, and the suspender design is convenient to carry. Simple to use. The shape is unique, and the overall look is exquisite and beautiful. Simple operation: The sleep meter is light and portable, easy to operate, light in weight, small in size, fast in USB charging, and easy to use. Round button design, one-button start, easy to use. Easy to carry, suitable for home and travel use.