RS232/USB 16 ports gsm modem for sms Wavecom original sms gateway GSM/GPRS modem Industrial design Aluminum casing Wireless access to internet Based on original Wavecom module With TCP/IP protocol stack Dual-band 900/1800MHZ or quad 8500/900/1800/1900.(based on different module.) Comply with ETSI GSM phase 2 + standard 3V SIM card slot DB15 RS232 interface including RJ11 for voice (handset) USB interface also support SIM application toolkit Double tone multi-frequency function (DTMF) Send and receive data, e-mail, SMS, and voice Maximum transmitting speed: 115.2Kbps Support AT command to make remote control (GSM07.07 and 07.05) GPRS class 10 Antenna with high sensitivity Always on-line Output power Class 42W at 900MHz Class 11W at 1800MHz Input voltage: 6 to 36V DC Input current: 1 to 2A Standby current: 56Ma Working current: 100 to 140mA Working temperature: -20 to +55 degrees Celsius Storage temperature: -25 to +70 degrees Celsius Accessories: AC/DC adapter, RS232 cable, antenna, and CD. Gross weight is 4.5kg.