We are rluck based in shenzhen , China. We are member of companiess.com since December, 2008. Our business is related to Electrical & Electronics Supplies industry and we specifically deal in electronic. Please find our product details below:GPRS MODEM1. Modem G-55R based on MC55I (900/1800/1900MHZ) with TCP/IP stackIndustrial designAluminum casingWireless access to internetComply with ETSI GSM phase 2+3V SIM card slotStandard RS232 interfaceSIM Application ToolkitDouble tone multi-frequency function (DTMF)Send and receive data, fax, e-mail, SMS Fax group 3, class 1, 2Maximum transmitting speed 115KB/sGPRS Class 10Antenna with high sensitivityAlways on-lineOutput PowerClass 42W @ 900MHzClass 11W @ 1800MHzInput voltage6V-36V DCInput current1A-2AStandby current: 56mAWorking current: 100-140mAWorking temperature -20 -+55 Storage temperature:-25 -+70 Size985425mmWeight130gAccessories: AC/DC adaptor, RS232 cable, antenna, 2 mounting plates, CDSell gps tracker car tracking system GT-01 can control car remotely by monitoring center. Engine Stop Panic Door Unlock5.Voice Communication6.Wireless Central Locking Speed Monitoring8.6 OnAir Updateable NOGO Zone.Thank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.