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The product does what it is intended to do and shake paint. Downside is you need an app to change the RBG and vibration speed and it looks like the company neglected all about it as it barely functions. On android devices, you need to install a new app store while disabling a lot of security settings before being able to download the app. On IOS, the vibration slider is not functional so it is stuck on 1700 rpm. The app starts up in Chinese and you need to register in order to change the language, to summarize the reviews on the IOS store, the registration system is not sending verification codes. There are cheaper options on the market unless you really want the RGB

If you have the app installed, you need to give it bluetooth and location permissions