GSM Alarm: Difference between CXG4D and NHG9D and LMG3T

[admin]

While all three models are GSM Burglar Alarm, they are actually older and newer models with same basic operations with different enhancements.

NHG9D and LMG3T are two older versions.

NHG9D is a dual band version supporting only GSM 900 and 1800 while LMG3T is a tri-band version basically for USA that supports GSM 900, 1800 and 1900. In addition, LMG3T is specially with built-in backup battery while NHG9D not.

CXG4D is a newer version at higher price, this new version has more than older one including:

1) support 5 wired plus 16 wireless
2) with built-in battery
3) better SMS e.g. power on/off notification
4) 24 hours defense zone, etc.

A newer manual available, please download

http://forum.best-china-security-suppli ... php?t=1756