High Stability and Double-layer Magnetic Separation: There are 3 metal balls at the bottom of the phone shake wiggle device can increase the stability in the process of swing; The double-layer magnetic separation will prevent phone form magnet interferenceafter connecting to the powerAutomatically Brush Steps Device: The phone swing device can pretend that you are walking by automatically swinging, you will earn 7000-8000 steps per hour easily; It is ideal to increase the numbers of walks and help you to hatch eggs in Pokemon Go whetherat sleep or at workConvenient and Noise-free Design: This automatic swing motion was made of metal bracket and plastic base, which can be used for a long time; It is very easy to disassemble and carry for people who go out; High quality metal bracket is smooth so that itwill not disturb your good dreams even when you are sleepingFit Multiple Phone Models: The shake wiggle device suits most mobile phone under 6.2 inches, and most apples also can be used, such as Google fit, Walker and more; Besides, It can be used as a mobile phone holder, you can put your phone on the steppedsafety rocker while watching movies or listening to music without blocking the screenEasy to Use: The phone run step count program can be connected to the power source with the USB cable or 4 AA batteries(not included); Just put your phone on the bracket frame and fix it with rubber band, after connecting the power supply and then pushwith hand, it will swing and brush step automatically