One product works correctly on both purchased in January 2015! Both generate instability of the display problems. Problems never occur if the screen is connected directly to the Macbook Air. The product very hot but if there was not this display problem on the screen, it would be ok as long as the finish is rather pretty.
Belkin for the defective product offers me a voucher corresponding to the price I paid because they are unable to replace it in a time of less than one month. It's not perfect but it's acceptable.
