Technical index:
Communication method: industrial GSM module
Working frequency: EGSMTX/890 - 915 MHZRX/925 - 960 MHZ
DCS TX/1710-1785 MHZRX/1805-1880 MHZ
PCS TX/1850-1910 MHZRX/1930-1990 MHZ
Alarm method: GSM Chinese short message and sound dialing
Alarm response time: 8 seconds (GSM network signal is normal.)
Alarm volume: 110db    alarm sound v