Type:GSM Port Number:2 Working Frequency:GSM 900/1800MHz,GSM 850/900/1800/1900mHZ Product name:gsm to pstn landline gateway Type:GSM/PSTN RJ11 ports:1 fxo,1 fxs port Low cost routing(LCR):support Caller ID display:DTMF/FSK(optional) Antenna Interface:SMA-female warranty:1 year Dimensions (L x W x H):185 x 135 x 22mm G.W.:0.75kg color:white/black(optional) Show More