The upgraded version of the donut broadband antenna has a frequency range of 10kHz-180MHz and a low-impedance converter. Compared with the old donut, this donut does not require cumbersome tuning. There is no need to replace the antenna for low and high frequencies like the old model. Each band has its own All frequencies can be listened to directly, and the compatibility is strong. It is a very convenient donut antenna for those who need to scan. The set is paired with a low-impedance converter and is suitable for all radios, walkie-talkies, SDRs, radio stations, etc. Due to different batches, the appearance, color and printed words of the product , which not affect the use. Colour:Black Material:Metal Package Contents: 1 * Low impedance converter 1 * Upgraded Donut Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.