The new UNO550RF keypad comes with a graphic, full message display capable of showing system status messages, zone labels etc.
The UNO5500RF comes with a built-in 433MHz RF receiver that support either SOLO sensors or DSC format sensors.
You can put mulitple keypads on a system and they can all listen to inputs from all sensors, greatly enhancing 433 RF reception and avoiding missed signals.
The UNO5500RF comes with large, easy to use buttons for simple control of the UNO system it is attached to.