gsm alarm system

1.GSM 850/900/1800/1900MHz
2. Compatible to alarm systems

3.Polarity reversal 12/16kHz pulse singal

Specifications:

 
Quad band, Supports GSM850/900/1800/1900MHz Frequency

Compatible to all kinds of Alarm systems

Simple to install and easy to maintain

Allow pin code entering and reciprocal phone-card lock

Industrial module item (NEW)

Polarity reversal signal for metering

Support caller ID and handsfree

Cost rate setting enable

Incoming call reminder

Compatible to PABX 

For extensions.