... 3.With Wireless Keypad GSM Module Alarm System, TCP IP/GPRS Control Panel, Supports 10-piece LCD Keypads and 16 RemotesFeatures ... two way siren, 32 wireless electric switch.Module expanded: GSM/GPRS module, siries port module, relay module, TCP/IP module, PGM ... names from SD card. GSM Module Alarm System, TCP IP/GPRS Control Panel, Supports 10-piece LCD Keypads and 16 Remotes