The KC4 is a 4-band, 1000-watt resonant vertical antenna intended for base station use. It is engineered for smooth multi-band operation, utilizing top loading to maximize efficiency from a short, self-supporting vertical radiator. Once installed, you can easily switch between bands without making any adjustments. The KC4 operates without the need for ground radials. Features/ Technical Specifications: Antenna Height: 7.8 METER Antenna Weight: 6.8KG Package Dimensions: 0.46*0.46*3.9FT Main Rod Inner Diameter: 1.6 INCHES / 4.1 CM Frequency Range:7/14/21/28MHZ(40M/20M/15M/10M) Power: 1000 WATT PEP (CW500W, RTTY300W) Antenna Impedance: 50 Ω VSWR: ＜1.5:1 Bandwidth: 40m- 150kHz, 20m- 450kHz, 15m- 800kHz, 10m- 1000kHz Rated Wind Speed: 35 m/s Antenna Feedline Connection Type: UHF FEMALE, SO-239 HF Vertical Antenna Mounting Position: ELEVATED Mounting Clamps Included: YES NOTE: The recommended installation height is 1.5 meters — this is the height we tested near the label position. User Manual - Here