Upgraded donut broadband antenna, frequency range 10kHz-180MHz, with low impedance converter. this model does not require tedious tuning. Low and high frequencies do not require antenna replacement like the old model. Each band and frequency can be listened directly, with strong compatibility. Easy to Install and Use: Our circular antenna is designed for easy installation and simple operation, ensuring users can start using it with minimal effort. Our medium short wave antennais finely crafted with no burrs or edges, ensuring a smooth and safe user experience. Donut broadband receiving antenna, shortwave antenna, malachite antenna, aviation receiving antenna, FM antenna AM antenna, default connector: SMA male (inner pin and inner screw) UV-k5/k6 walkie-talkie available Donut broadband receiving antenna: 1. Frequency: 10k-180MHz 2. Connector: SMA male (inner pin and inner screw) Uses:Small loop antenna, Donut antenna, Mini Loop, for radio antenna, tuning loop. Note:This antenna is a narrow-band high-impedance resonant antenna, which needs to be used with the high-impedance input port of the Malachite receiver, otherwise it will cause the antenna to be detuned and unable to work! ! ! Note: Due to different production batches, there may be slight differences in products. Colour:Photo Color Material:ABS Package Contents: 1 x 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.