This HF shortwave is designed specifically for 1.8-50MHz high-frequency communications. The connectors are brazed with pure copper, ensuring stable signal transmission and strong durability. Optimized for demanding digital modes like FT8, it effectively suppresses common-mode interference and resolves issues such as USB device disconnection, computer freezes, and peripheral device anomalies. High Frequency and Wide Coverage: Suitable for 1.8-50MHz shortwave communications, covering multiple amateur bands. Highly Effective Interference Rejection: Significantly reduces USB interference, computer freezes, and touchscreen anomalies in modes like FT8. High Power Handling: The standard version has a measured power handling capacity of 350W (FT8 mode), while the large version has a power handling capacity of 550W, with instantaneous power reaching 850W. Magnetic Ring: -zinc, 50mm (outer diameter) / 30mm (inner diameter) Connector: Pure copper soldering, standard interface Feeder Type: Ultra-flexible RG58 feeder cable Applications 1. Amateur radio FT8, JS8, WSPR, and other digital communication modes 2. Improves common-mode interference in antenna systems, enhancing signal purity Specifications: 62mm black Color: Black Material: Metal Package Contents: 1 * HF Shortwave 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.