... Industrial design. Aluminum casing. Wireless access to internet. Comply with etsi gsm phase 2. 3v sim card slot. Standard rs232 interface. Sim ... ,2. Maximum transmitting speed 115kb/s. Gprs class 10. Antenna with high sensitivity. Always on-line. Output power. Class 42w @ 900mhz ... /dc adaptor, rs232 cable, antenna, 2 mounting plates, cd. RS232 GSM /GPRS modem with siemens MC39I module