Usage:Home Name:gsm screen alarm system Other name:gsm system Certificate:CE RohS ency:315Mhz 433Mhz GSM Frequency:850Mhz 900Mhz 1800Mhz 1900Mhz APP Support:Yes Language:Multiple Language Support Timely Arm Disarm:Yes, support. SOS Function:Support Input Voltage:DC12V
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