Specification _x000D_ Material: ABS, Stainless steel _x000D_ Color: White, Blue, Yellow _x000D_ Size: 11.9x5.1x3.3 cm _x000D_ Weight: 56 g _x000D_ Battery: 400 mAH _x000D_ Input voltage: DC5V /1A _x000D_ Working power: 0.5W _x000D_ Charging port: Micro USB 11. The sleep aid instrument is made of high quality material, stable and firm, durable for use. one key to turn on, adjust power. Easy to fall asleep every day. 22. Quick Sleep Aid: This sleep aid device can helps people with lack of sleep and poor psychological quality to help you fall asleep as soon as possible and get a healthier and better sleep. 33. Gently hold the sleep aid machine, the micro current is transmitted to the brain through the Laogong acupoints in the palm of the hand to produce a calming and relaxing effect, helping to sleep healthily. 44. Light weight, small size, latest aid sleeping device is easy to carry around. USB charging design, multiple power supply modes, easy and convenient charging, long endurance. 55. It can be used in the office, at home, moderately relieve headaches. Let you get rid of insomnia, anxiety, sleep depression, insomnia, and help patients get good sleep.1 Sleep Aid Device