... 2. 315 mhz or 433 mhz optional best gsm home alarm systems with LED displayModel: EB-830Dimension: 256*236*69(mm)Operating ... Mode: by remote controller, telephone, keypadAlarm Mode: to the alarm center, to the telephone, to the electric sirenRecording Time: 10 ... 20 secTelephone Tumbers: 6 groupsPasswords: 2 groups of 6 digitalsWired Alarm Input: NO/NCMaterials: steel box and ABS keypadWeight: 3000gMain ...