2 Band (900-1800mhz) 4 Band (800-900-1800-1900mhz) GSM to PSTN Terminal backup battery can work with alarm system Features:1) Supports both GSM networks.2) Simple to install and easy to maintain 3) Allow PIN code entering and reciprocal phone-card lock 4) Moblile phone board item and Industrial module item are optional5) Polarity reversal signal for metering 6) 3.5dBi gain antenna 7) Compatible ...
[China Manufacturers]