... Built-in Antenna GSM PCB Antenna Frequency:890-960/824-894MHz,1710-1990MHz Gain:3dBi Antenna Length:43mm AMPS/GSM Built-in Antenna GSM PCB AntennaFrequency ... Electronics Co.,Ltd products: GPS antenna, GSM Antenna, Combination GPS/GSM Antenna, WIFI 2.4ghz Antenna, DVB-T ital TV Antenna, 868mhz/315Mhz/433Mhz/3.5g ...