Description: Sleep Holding Aid:The sleep aid machine adopt microcurrent technology, can promote sleep, it can helps people who is lack of sleep and poor quality sleep to sleep as soon as possible. Adjustable:2 modes 3 strengths, sleep aid and high frequency encouragement , and the digital gear display is clear at a glance. One key to close, easy to operate. USB Rechargeable:USB charging, long battery life,low noise. Mini and handheld:This device can make you relax, , improve sleep quality, lightweight and portable, suitable for office, home and travel. Simple Design: Comfortable to grip, great gift for your friends. Specification: Material: ABS Stainless Steel Power Supply: USB Handheld Size: length 8.5cm/3.35inch, width 3.5cm/1.38inch, strap about 25cm/9.84inch long Foot Size: length 8.5cm/3.35inch,width 3.5cm/1.38inch, straps about 30cm/11.81inch long Hand Foot Dual Use: length 8.5cm/3.35inch,width 3.5cm/1.38inch, hand strap about 25cm/9.84inch long, foot strap about 30cm/11.81inch long Package Includes: 1 Piece Sleep Aid Machine 1 Piece USB Cable Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!