Phone Swing Device, Automatic Shake, Electronic Perpetual Motion Machine Rotary Swing Balance Ball Motion Brush Step Safety Wiggler Mobile Phone Holder with USB Cable Automatic Step Brush: With this phone turning device, pretend that you are running and have the WeChat program records the steps automatically, about 7000 - 8000 steps per hour, it makes you rank first in the step counter program, feels like you are having a real walk or running, it can also help you Ha tch eggs in POKEM ON Go while you are sleeping or working No damage and no noise: It adopts double-layer magnetic insulation technology, safe to shake the phone and is not affected by magnetic force; High-quality metal holder is smooth and burr-free, does not scratch your hand and mobile phone, the plastic holder is wear-resistant, will not affect sleep when shaking at night Arouse interest in physics: The vibration device will not stop unless artificial resistance or power is cut off, as a physical science educational toy, the rotating balance ball can inspire children's interest to better understand the electromagnetic induction principle Fit for phone less than 6.2 inches: Suitable for most phones 6.2 inches or less, apply to most applications such as smart bracelet, Wechat movement, ant forest. It can also be used as a mobile phone holder, you can put your phone on the brush while watching movies or listening to music, it does not block the view of the screen Easy to install and use: The electronic perpetual motion machine can be powered by USB or 4 AA batteries (not included), put your phone on the bracket frame, fix it with the rubber band, connect the power supply, and then push by hand, it will rotate and brush the step automatically