Features: 1. Omnidirectional coverage: The design of circular antennas often gives them good omnidirectional radiation characteristics, which means that the signal transmission or reception in all directions on the horizontal plane is relatively uniform, suitable for broadcasting and multi-directional communication needs. 4. Easy to install and adjust: Most designs are easy for users to install on their own, and some models may provide tunable components that allow users to adjust the operating frequency as needed to optimize the receiving or transmitting effect. Parameter: Blue: SW shortwave antenna Frequency range: 4MHz-24MHz Interface: SMA needle interface Size: Length 110 * Width 100 * Height 20mm Red: AM medium wave antenna Frequency range: 500kHz-2000kHz Interface: SMA needle interface Product Description: Black: Broadband receiving antenna Frequency: 10k-180MHz Connector: SMA male head (inner needle and inner thread) Size: Length 110 * Width 100 * Height 12mm Product Description: Upgraded Sweet Donut Broadband Antenna, with a frequency range of 10kHz-180MHz and a low impedance converter. This model does not require complicated tuning and can be used directly for low and high frequencies without changing the antenna. Each band and frequency can be listened to directly, with strong compatibility. It is recommended to use it with Quansheng UV-k5/k6 walkie talkies. Package include: 1X module