... 16 HARDWIRED ZONESCK-338I HARDWIRED ZONES, 8 WIRELESS ZONES LCD Display LED KEYPADCONTROL PANLES WITH PROGRAMMABLE ZONESAUTOMATIC DIALERMASTER CODE, USER CODE,INSTALLATION CODE ... SUPPLY: 16.5VAC, 25VA, CLASS 2 TRANSFORMER * 3 PHONE NUMBERS WITH 18-DIGIT NO AT MOST. * REPORT: DUAL CLASIFIED OR BACKUP ... : 3/1 EXTENDED, 4/2, CFSKIII, 4+2 ADEMCO home alarm system