... of relay outputs products introductionThis Excellent GSM + Camera alarm system bases on the GSM network, integrates the communication ... Adopt three bands, GSM 900/1800/1900MHz, alarm remotely without the limit of distance.300,000 ... hint function for camera fault.Support GSM/CDMA, remotely control the alarm host to arm/ disarm/listen-in/ ... ,1 power supply, 1 manual GSM alarm system with MMS&SMS function