... 4.PPP,TCP, UDP, HTTP, FTP, SMTP, POP3 TTL GSM/GPRS modem MODEL:G-52TTLGeneral FeaturesIndustrial designAluminum casingWireless access ... tone multi-frequency function (DTMF)GPRS Class 10Antenna with high sensitivityAlways on-lineOutput PowerClass 4(2W @ 900MHz)Class 1 ... +70 degreesSize 85*54*25mmWeight 110gAccessories: AC/DC adaptor, TTL cable, antenna, 2 mounting plates, CD Specification for GPRS ...