The bracket allows you to mount the vent below the window with screws or double sided tape.
Just wanted to say Great job. Your superior service and attention to detail has landed you a customer for life. I had recently made an identical purchase elsewhere online and was completely dissatisfied. Having no previous internet shopping experience, I assumed purchasing a household name brand from store "a" and store "b" there would be little difference. I will be the first to confess, I was truly mistaken. Still waiting to see a refund from the other guys. RJ Ingham — , USA —