Active L1 L2 L-Band GPS and L1 GLONASS Antenna

Antcom Active L-Band , L1 L2 GPS, L1 GLONASS L1 GPS OmniStar Antenna, 3.5in dia. top/bottom mount configuration (with filters, better RTK performance, optimized for L1 GLONASS and L1 GPS & OmniStar)