C1-PLL C-band LNBF - WiMax 4G LTE WiFi Filter - PLL Phase Lock Loop World's First PLL (Phase Lock Loop) C-band LNBF with LTE / WiFi / Radar Interefernce Filter (3.7 - 4.2Ghz) Perfect for receiving hard to capture weak signals Lock onto high FEC and Low SR DVBS and S2 channels Stability: +/-50Khz and 10Khz @ operational temp Limited Lifetime Warranty against Defect and Frequency Drift