... 2G/3G mobile network, enable the system works great in worldwide.◇ 99 zones for security intrusion alarm, elderly care, SOS help, ... rechargeable battery inside, AC power lost alert available.◇ Audible alarm inside, support wireless siren too.◇ Ademco Contact ID protocol over GPRS/UMTS ... recall backto confirm the arm success (you should reject the system’s recall), and open yourdoor at same time.This ...