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