... groups of relay outputs products introductionThis Excellent GSM + Camera alarm system bases on the GSM network, integrates the communication technology, can ... /send MMS by remote controller or SMS.Support two-way intercom , can turn on the siren remotely, speak to the alarm ... components 1 main panel, 1 wireless PIR detector, 1 wireless door sensor,1 siren, 2 remote controllers, 1 camera, 1 GSM ...