... l. Voice prompts, easy to operate, can be installed GSM phone cards,two-way intercom function.2.The host has 96 ... -code.7. Remote remote monitoring, propaganda function, and can remote phone or send text messages to the host arm, disarm operation ... SMS tips, you can manually switch;10. Host using dual band, tri-band, quad-band frequencies GSM / GPRS industrial module, stable and reliable.11 ...