Wholesale China Post .GSM Controller for burglar alarm system with SIM card (2 Input / 2 Output / USB
GSM SMS Remote Control System: Supporting Wireless SMS control * SIM Card: Supporting 3V Mobile SIM Card * GSM Frequency: Default: 900/1800/1900Mhz , Optional: 850/1900/1800/1900Mhz * Input Type: 2 Dry Contact, NC,NO,EOL. * Output Type: 2 Relay Output, 240VAC@3A, Relay inside.