Product Features: XL50 Controller, excellent human-machine interface; 8 function keys, 4 quick access keys, 4 lines with 16 characters per line; low-cost modular design; simple applications via PC application tool package. Programming software CARE2.02.ec, compatible with Honeywell Excel 5000 series controllers using the same software; pre-configured application modules; standalone operation or networking capability with Excel 5000 C-Bus, and communication interface with ISDN/GSM card, along with LON and M-Bus communication functions; simple wiring; uses magnesium capacitor to maintain 72-hour backup battery memory; Flash EPROM allows easy application software modification and program downloading, which can be completed via B-port or C-Bus. XBS Ver1.4.1 or XI584 Ver 1.4.1 or later versions support this feature.