Dear customer:about the sms modem,we have four itmes,different item different function and of course different price,we have wavecom modem with

 

Q2303,Q2403,Q2406,Q24Plus.

Q2303 support sms.900/1800MHZ

Q2403 support sms and mms.900/1800MHZ

Q2406 support sms,mms and TCP protocol.900/1800MHZ

Q24plus suport sms,mms and EDGE.850/900/1800/1900MHZ

 

 

 

 

The 8 USB GSM Bulk SMS MMS Modem Description:

 

The device built-in 8 wireless modules be inserted 8 SIM cards use 8 cards to send text messages.send speed as 8 times as a single channel modem. It uses the development of WAVECOM module, 220V power supply be a long time stability, generous luxury housing. it is working compatible with windows 2008 R2,Windows 7,Vista,XP,2006/2000,98SE/CE,LINUX, .