... STOCK 400pcs/box AT+GSV SIM900 GSM GPRS module, Quad-band, industrial standard Sim900,SIM900 Simcom wireless module,Simcom modules,modulesGeneral features * Quad ... USSD* Non transparent mode* PPP-stack Specifications for SMS via GSM/GPRS* Point to point MO and MT* SMS cell broadcast* Text ... interface (option)* Serial interface * Antenna pad* I2C* GPIO* PWM* ADC GSM/GPRS module SIM340 Wireless modules