... CDMA,GPRS communication AMR system/AMI System/MBUS,RS485,PLC,Wireless AMR System with CDMA or GPRS ... monitor the status of gas in users houses real-time, when the gas leak out, it ... and realize security prevention by wireless deployment;5. Information storage and inquiry: can collect other kind ... greatly facilitates the day-to-day work for property management companies.4. Economyadopt modularize design, ...