Thank you for your interest in our products. Our U1 remote control supports all the devices you mentioned, except for the IQAir HealthPro air purifier. Registering an account requires your email, and the password is set by you, without telling us. The U1 remote control provides a one-year warranty service. If you have any problems during use, you can contact us at Sofababon@outlook.com for technical support. The following video can help you understand the basic operation of U1. https://www.youtube.com/watch?v=hMSmvxwDeI4