This is DSC's newest style 64 zone fixed LCD keypad. Not to be confused with the full alpha programmable 5500 model, this keypad though LCD is not programmable and is somewhat of a cross between the LED and LCD type. Features five function keys and a PGM / Zone input on the keypad for adding a remote zone or remote PGM output. Works with all DSC Power Series systems, from the older 432, 632, 832, and 864 systems up to the newest models. Also available with a wireless receiver built in. PK5501 Installation manual PK5501 Specifications sheet

Same keypad as the PK5501, except this RFK model has a built-in 32 zone wireless receiver module that adds wireless capability to any DSC Power Series model system. Works with all DSC Power Series systems, from the older 432, 632, 832, and 864 systems up to the newest Power 1616, 1832 and 1864 models. RFK5501 Installation manual RFK5501 Specifications sheet

This is the same keypad as the PK5500, except this model has a built in 32 zone wireless receiver module that adds wireless capability to any DSC Power Series model system. Works with all DSC Power Series systems: from the older 432, 632, 832, and 864 systems; up to the newest Power 1616, 1832 and 1864 models.NOTE: You can only have one RFK5500 model keypad per system. If you need a secondary keypad that is just like this one, but without the wireless receiver, choose the PK5500 model.RFK5500 Installation Manual RFK5500 Specifications Sheet