Model TW3882 Dual Band GNSS Antenna Image Coverage GPS L1/L2, GLONASS G1/G2/G3, Galileo E1/E5b, BeiDou B1/B2 Gain 35 dB typ. Connector Many Options, Please Inquire. Model TW3892 Dual Band GNSS Antenna with L-Band Image Coverage GPS L1/L2, GLONASS G1/G2, Galileo E1, BeiDou B1, L-Band Correction Services Gain 35 dB typ. Connector Many Options, Please Inquire.