The 1802-EPD stores up to 100 telephone numbers and names | EEPROM Memory Chip | Full duplex communication | 4-digit entry codes (up to 100) | 15 area codes | 5-digit entry codes (up to 6) | 16VAC, 20VA (250ma) power transformer provided | Ringer equivalence: 0.0 A | Jack type: RJ11C or W | FCC (US): DUF6VT-12874-OT-0 | DOC (CAN): 1736 4507 A | Complies with UL 294; ETL Listed | Surface mount dimensions: 12″H x 6.5″W x 5″D | Flush mount dimensions: 14″H x 8.375″W x 3.25″D | Programmable directory codes