Welcome to my shop. GP4 Shortwave Ground Plane Antenna Vertical GP Antenna 4 Bands Working Frequency. GP4 Ground Plane Antenna 4-Band GP Antenna 7/14/21/29M Boasts Excellent Performance High Efficiency Description. GP4 4-band 1/4-wavelength shortwave GP antenna features working frequency of 7, 14, 21, 28/29M. It is suitable for long-term use outdoors and on the roof. No need to replace the coil to switch the frequency. Exquisite notch technology and superior electrical structure performance makes it a high-efficiency GP antenna. It is simple to lay ground net (more than 6 ground nets; length 2.5m/8.2ft or 5m/16.4ft), with a installation board. In principle, the more ground nets, the better. The recommended installation height is 0.3-0.5m/1-1.6ft. The test version has been used by many users in China for many years, and they are satisfied with the antenna. Easy to set up and to use. It is worth having! Height: 5.65m/18.5 ft. Net weight: 2.3kg/5.1 lb. Wind resistance level: 12. 1 x Set of GP Antenna. Please make sure it is correct. We believe our items are so outstanding. All products are quality checked. Otherwise deal is final. We will be happy to resolve any issues you may have in a cordial and friendly manner. We appreciate your Postive Feedback, and will do the same in return.