DSC-SCW457 Impassa Self-Contained 2-Way Wireless Security System Control and Indicating Equipment Specifications 64 Wireless zones supported and 2 hardwired zones available on the main board. 28 zone types, 13 programmable zones attributes. 4 remote, wireless indoor/outdoor warning devices supported. CMOS EEPROM memory - retains programming and system status on AC or battery failure Data Retention: years min. Up to 2 programmable outputs (PGM) with 13 options. input ratings: 16.5VAC/20VA (Min) @50/60Hz, 100mA Plug-in transformer included