SIS is the leading manufacturers of SIM 300 GSM modems offers lowest price in India; Features of SIm300 Module - â¢Designed for global market, SIM300 is a Tri-band GSM/GPRS engineâ¢Works on frequencies EGSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz.â¢SIM300 features GPRS multi-slot class 10/ class 8 (optional) and supports the GPRS coding schemesâ¢CS-1, CS-2, CS-3 and CS-4.With a tiny configuration of 40mm x 33mm x 2.85mm ,â¢SIM300 can fit almost all the space requirements in your applications,â¢such as smart phone, PDA phone and other mobile devicesFeautures of GSM Kit â¢This GSM modem is a highly flexible plug and play quad band GSM modemâ¢integration to RS232.â¢Supports features like Voice, Data/Fax, SMS,GPRS and integrated TCP/IP stack.â¢Control via AT commands(GSM 07.07,07.05 and enhanced AT commands)â¢Use AC â DC Power Adaptor with following ratings ⢠DC Voltage : 12V /1Aâ¢Current Consumption in normal operation 250mA, can rise up to 1Amp while transmission.Interfacesâ¢RS-232 through D-TYPE 9 pin connector,â¢Serial port baud rate adjustable 1200 to115200 bps (9600 default)â¢BRK connector for MIC & SPK, SIM card holderâ¢Power supply through DC socketâ¢SMA antenna connector and Murata Antenna ( optional)â¢LED status of GSM / GPRS module