ClearStream antennas represent a new breakthrough in size and unmatched ultra efficient design and gain. Advanced design software allows these 10x 20 antennas to be smaller and powerful across the entire DTV spectrum offering consistent high gain. Advancements in antenna efficiency allows up to 98% of the available broadcast signal to actually reach the incoming antenna cable rather than being lost to impedance mismatches. The C4 is our elite digital antenna with it's superior quality and performance for viewers in poor signal areas who require a powerfull and compact antenna. Range: up to 65 Miles Gain 14.8 db.