Multitech MTCBA-G-F4. GSM bands supported: 850, 900, 1800, 1900 MHz, GPRS coding schemes: CS1, CS2, CS3, CS4, SIM interface: 3 V. Serial interface type: RS-232. Antenna connector type: SMA. Supported network protocols: DNS Resolve, FTP, IP, IPCP, LCP, PPP (dial-out), TCP, UDP, CHAP, PAP. Weight: 119 g, Dimensions (WxDxH): 61 x 110 x 24 mm