Feature:1. Reliable Works: Comes with a wide frequency range of 535MHz, including 7MHz, 14MHz, 21MHz, 28MHz as well as amateur band.2. Simple Setting: Highly portable, the Balun module can be set up as an inverted V, horizontal, tilted or vertical radiator.3. No More Tuning: Designed for working without tuner and to optimize the driving elements for any part of the frequency band.4. The Using Tips: Use a high voltage capacitor with a specific radiator length on the transformer primary to ensure safe work.5. Easy to Install: Light in weight and compact in size, the convenient installation can be quickly completed within minutes.Specification:Item Type: Balun PCBMaterial: PCColour: GreenRated Continuous Power: 50WPET: 100WFrequency: 5-35MHz, including 7MHz, 14MHz, 21MHz, 28MHz, amateur band. Interface: BNC female head. Erection Method: At least 1 meter away from the ground, just connect a 20.2 meter vibrator. .Package List:1 x Balun PCB