Three Holders for Selection(Holder 3 needs to buy separately):
Holder 1: The backup camera comes with this metal holder installed well by default. You can install it with horizontal or vertical(upside down) mounting.
Holder 2: If you don't want to drill a hole on your vehicle, you can apply this silicone holder. Insert the round camera body into the silicone holder, then you can install it with ease.
Holder 3: This metal holder is for flush hidden mounting, need to drill a hole. Need to buy separately with ASIN: B0BLG78TTM.