hi we need Marathon race reader 4 port fid reader With TCP IP GPRSApplication:For School Attendance SystemDimension:310*210*41MMNet Weight:1880gSupport Interface:RS232, RS485, RJ45(TCPIP)Protocol:EPC, CLASS1,G2,ISO18000-6Cfrequency:902~928MHz or 865~868MHzRF Output Power:30dbmFactory:YesPower Dissipation:+9 DC