1,gsm sim modem 2,sending bulk SMS 3,with bulk sms software 4,quad band 5,AT Command ... or 900/1800 Mhz64 x SIM card(big/small) slotsComply with GSM phase2 standardSend and receive SMS,MMS Maximum transmitting speed ... into device2, Install Driver. 3, Install Software. We provide free software named SMS Caster if you don't have.P ... me freely! Quad band 64 port USB GSM sms modem with free English software