[Specially Designed]: Suitable for all smartphones under 7.2 inches.[High Quality Material]: Smooth plastic material will not scratch your smart phones. And since we upgraded with the metal wheel on both sides. It will not produce noise. The device can hold 2 phones on the holder plate with the rubber band at the same time to help you and your family win steps together quietly.[Powerful Functions]: You can quickly increase steps in apps like WeWard, Pokemon GO (Adventure Sync), Walkr, Google Fit and earn 7200 steps per hour easily to hatch your pokemon faster without going out![Note Precautions]: Since each smartphone has different sensor settings and locations, if the device does not count steps, please place the phone upside down on the device or contact us. Note: Data are all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.