Single Band Two half-wave Element Collinear Array gives you nearly 2 dB gain -- about 150% power gain -- and twice the receiving capture area of a half-wave dipole. Direct coax feed and low SWR across the band. Two elements give 2 dB gain, they are very quiet and handle 1500 Watts. Virtually Hang and Play when you receive them. No cutting, soldering, tuning, or trimming needed. Follow easy set-up instructions and you're on-the-air! This one factory set for resonance on 17-Meters.