... 100)This is a easy operating burglar alarm system with wireless sensors ,it use wireless frequency to work, only need one local SIM ... Setting status indicator, it shall be on when entering the system setting.SIGNAL:Wireless signal indicator, it shall be on when effective ... Current:<35mA Alarm Current:<450mA Wireless Frequency315MHz or 433.92 Mhz optional;,2262 / 4.7MΩGSM System:850/900/1800/1900MHz are ...