3g antenna Electrical Specification Frequency range 900MHz/1.7GHz/1.9GHz/2.1GHz Gain 3.0min VSWR 2.0:1 max Impedance 50 Ω Polarization Vertical Connector SMA /IEC/MCX/CRC9 or Customization Cable RG-174 Coaxial Cable THIS ANTENNA for 3G data card Huawei USB adapterDakotek is a company specialized on DVB antennas,wireless antennas,WLAN antenna,rubber duck antenna, 3G antenna,2.4G/bluethooth antenna,rod/retractable antenna,membrance antenna,car antenna,GPS antenna,RF connectors and coaxial cable assembly in China since 1997 with many years' experience of OEM and ODM service.