Black Sesame Tilt & Swivel Adjustable Speaker Mount for Sonos Move Wall Mount, Heavy Duty Mount Shelf for Sonos Move Mount Bracket

My brackets arrived without instructions for assembling the bracket. Where can I find instructions?

How many brackets come for $21.99? One or two brackets?

Does this mount come in white?

Can the speakers be removed from the brackets without any tools? I’d like to mount the brackets but have the flexibility to easily move the speakers.