... stack 900/1800MHZ STK,internet, data, sms, GPRS MODEM RS485 SIM900AProduct descriptionGeneral Features Industrial designAluminum casingWireless access to ... degreesSize 85*54*25mmWeight 110gAccessories: AC/DC adaptor, RS232 cable, antenna, 2 mounting plates, CD Specification for ... 4kbpsUSSDPPP stackNon-transparent modeTransparent modeSpecification for SMS via GSM/GPRSPoint to point MO and MTSMS cell ...