There are several different major categories of Keypads for Gated Entry applications. There are WIRED vs WIRELESS and SURFACE MOUNT vs FLUSH MOUNT. There are also Commercial grade vs Light / Residential Grade keypads. Fortunately there is not a huge price gap between the most expensive, best keypads we offer and the lighter, less expensive units. Please feel free to call if you can't find the information you are looking for on our keypad pages. Also, we are happy to help you decide on the best unit for your application and know the features of the various units well. Thanks for shopping our website!