best gsm home alarm systems with LED display: 1.Each zone is programmed singly ... , 2. 315 mhz or 433 mhz optional best gsm home alarm ... by remote controller, telephone, keypadAlarm Mode: to the alarm center, to the telephone, to the electric sirenRecording ... : 6 groupsPasswords: 2 groups of 6 digitalsWired Alarm Input: NO/NCMaterials: steel box and ABS keypadWeight ...