Type : GSM
Port Number : 1
Working Frequency : GSM850/900/1800/1900MHZ
Product name : gsm to analog phone line converter
fxs/rj11 port : 2
caller ID : support
reversal polarity signal : support
DTMF 2'nd dialing out : support
IMEI Change : support
Locking PIN / network : optional
Back up battery : available
Color : black/white(optional)
Warranty : 1 Year
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