... RS232, RS485 Standard and Band: GSM850/900/1800/1900MHz 3G modem. Designed with industrial grade, supports SMS, CSD, RS232, AT ... data transmission, etc .Detailed information A. Wireless Specification1. UMTS/WCDMA/HSDPA/HSUPA 850/900/1900/2100MHz2. Quad-band EGSM 850 ... .5APower range: DC 5~26V3. Wireless moduleHigh-powered industrial WCDMA/HSDPA/HSUPA module4. SizeDimension(not includng the screw hole): ...