Compared with the old donut antenna, this model does not require tedious tuning. Low and high frequencies do not need to be replaced like the old antenna. Each band and each frequency can be listened directly, and it has strong compatibility. It is a very convenient donut antenna for friends who have scanning needs. It is suitable for all radios, walkie-talkies, SDR, radio stations, etc. Donut broadband receiving antenna, shortwave antenna, malachite antenna, aviation receiving antenna, FM antenna AM antenna, default connector: SMA male (inner pin and inner screw thread) for UV-k5/k6 walkie-talkie can be used. Antenna: Frequency: 10k-180MHz Connector: SMA male (internal pin and internal thread) Low impedance converter: Frequency: 10k-180MHz Connector: SMA male (internal pin and internal screw thread) Frequency: 10k-180MHz Charging interface: type-c Charging current: 1A Charging voltage: 5V Built-in 600mAh lithium battery (full charge can be used continuously for about 20 hours) Charging time: 4 hours Colour:Red Material:ABS Package Contents: 1 * Broadband Antenna 1 * Low Impedance Amplifier 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.