1.Send and receive data, fax, e-mail, SMS,MMS 2.dual-frequence 3.Q2303/Q2403/Q2406 ... Built-in wireless modules can be inserted SIM cards, simultaneously to send text messages. Applications · Large shopping malls, supermarkets· Professional ... slotsComply with GSM phase2 standardSend and receive SMS,MMS Maximum transmitting speed 115KBpsInput voltage: 100 to 240VWorking temperature: -20 to +60 degrees ...