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 Quansheng 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:Blue Material:ABS Package Contents: 1 * Broadband Antenna 1 * Low Impedance Amplifier