4 zone inputs (8 zones with zone doubling) + 2 keypad zones 2 partitions 49 user codes 256 events buffered 1 PGM output 950mA switching power supply Supervised bell output, auxiliary output and telephone line 2-wire smoke detector input option (input 3) Serial or parallel wiring for zone doubling connections Master Code Lock: cannot change or delete the Master Code or User Code 01 Supports pager reporting Closing Delinquency Timer: transmit a report when last arming exceeds timer Auto-test report can now be set in hours or days Includes 20cm x 25cm x 8cm (8" x 10" x 3") metal box