Yeelight dimmer switch

Hi, i have some questions. I am planing to buy several yeelights for whole appartment. I am planing to use yeelight switch dimmers for them.

  1. i am wondering if its possible to control multiple lights (2 at the same time) with 1 dimmer switch?

  2. is it possible to control 2 lights together with 2 different switches. For example hallway - 2 lights and 1 switch at one side and another switch at the other wisde of hallway?

  3. Dimmer switch - is it possible to pull off rotating knob? To spray it in another color?

  4. is there a list which lights can be controlled with Dimmer switch?

Thank you very much for your kind information.

Best regards