Single Product vertical scroll down

Hi guys

My website in mobile version the new arrivals tab is horizontal and 2 product in screen. I want to do it single and scroll down instead to the side. This is happening in categories but not in home page.
Have a look to this images to know what i mean:

http://www.freeimageupload.eu/image/sR7s
http://www.freeimageupload.eu/image/sEOu


Thanks for your help

Bruno