Exactly what I needed to replace a 10 year old 310 mhz gate keypad. Spoke to girl who answered phone and gave her the third degree. She chose the correct unit so I ordered one. Only one because I wasn't sure. Got the one I ordered, worked perfectly so I ordered a spare.
Product works very well. Programming was easy. Set mine up to work with an old model DIP switch Stanley.
Provided a great backup "spare"