Security-012pack 50mm x 15mm 5015 12V Dual Ball Bearing DC Brushless Cooling Blower Fan with 2 Pin Terminal

Can the speed of the fan be adjusted?

Anyone know how I could convert this to a usb connection?

I wired these to the blue and yellow wires on my cr-10s printer, but nothing happens. does anyone know why they wouldn't work? did i her dead fans?

Will this fan replace model jdh9733s brushless fan dc12v---1.0a