4ch Video DVR input,1ch audio input,AV video output,VGA output,local record,record replaying,remote surveillance. Built-in TEL/GSM alarm system,auto-dial 6 groups of alarm phone number,wireless arm/disarm,easily installation, operation by password to make sure the security of the system. External horn connect port,mute/sound alarm convertion, phone line anti-cutting and short Circuit alarm function. GSM alarm can send a SMS and dial out to alarm, arm/disarm the system by SMS.
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