GL09-B 3G 8 Channel GSM SMS Alarm System Module For Battery Operated Alert, GL09-B 3G Option:GL09-B 3G Battery impedance detection

GL09-B 3G 8 Channel GSM SMS Alarm System Module For Battery Operated Alert, GL09-B 3G Option:GL09-B 3G Battery impedance detection1. Low power consumption, suitable for battery powered 8 channel GSM alarm module 2. The 3G version is compatible with 2G networks and can be used in the United States, Australia, Europe, Chile, Singapore and other countries. 3. This product can be powered by DC power supply or by battery (the battery is not included in the product package) 4. Eight way alarm detection, each alarm SMS user can set different content by himself 5. You can choose the

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