... singly, 2. 315 mhz or 433 mhz optional best gsm home alarm systems with LED displayModel: EB-830Dimension: 256*236*69(mm ... , Contact IDAlarm Zones: 8 wired and 8 wirelessArm Mode: by remote controller, telephone, keypadAlarm Mode: to the alarm center, to the ... telephone wires, and anti-lightening protection.3. With function monitor on the spot.4. With the rechargeable circuit, it can operate when ...