... 1.Big LCD screen display ,Can display the date ,time ,alarm zone , alarm type and other informations. 2. Keyboard operation ,e 1.Big ... LCD screen display ,Can display the date ,time ,alarm zone , alarm type and other informations.2. Keyboard operation ,easy and ... wireless siren (optional )15)Arm or disarm alarm tone16.Anti-tamper function .17.Auto arm and disarm function .18.Back-up battery ...