GSM security alarm 1. 10 Zones(wireless/wire both) 2. 5 ... Model No.: DL-GSM10A Description: 10 zones GSM security alarm system n 4 wired and 6 wireless defence zones;n ... message recording;n Built-in intelligent English message;n Alarm locking memory and information clear for easy checking;n ... Arm, disarm, monitor and intercom by remote calling the alarm unit;n Real-time, delay, 24 hours, bypass defense ...