Product description: General Features Industrial design Aluminum casing Wireless access to internet Based on Wavecom module Q24 Plus With TCP/IP stack Internet Services: PPP,TCP, UDP, HTTP, SMTP, POP3 Open AT Flash memory 32MB, PSRAM 16MB 850/900/1800/1900MHZ 3V SIM card slot DB15 RS232 interface including RJ11 for voice(handset) SIM Application Toolkit Double tone multi-frequency function (DTMF) Send and receive voice, data, e-mail, SMS GPRS Class 10 Antenna with high sensitivity Always on-line Comply with ETSI GSM Phase2+ standard Output Power Class 4 2W @ 850/900MHz Class 1 1W @ 1800/1900MHz I Input voltage DC6V-36V Input current 1A-2A Standby current: 56mA Working current: 100-140mA Working temperature -20 to +55 degrees Storage temperature:-25 to +70 degrees. Size 95*54*25mm Weight 110g Accessories: AC/DC adaptor, DB15 RS232 cable, antenna, 2 mounting plates, CD Specification for data GPRS Class 10 max.85.6kbps(downlink PBCCH support Coding schemes CS 1,2,3,4 CSD up to 14.4kbps USSD Non-transparent mode Transparent mode Specifications for SMS via GSM/GPRS Point to point MO and MT SMS cell broadcast Text and PDU mode. Size 95*54*25mm Weight 110g.