Features 【No More Tuning】: Designed for working without tuner and to optimize the driving elements for any part of the frequency band. 【The Using Tips】: Use a high voltage capacitor with a specific radiator length on the transformer primary to ensure safe work. 【Easy to Install】: Light in weight and compact in size, the convenient installation can be quickly completed within minutes. 【Simple Setting】: Highly portable, the Balun module can be set up as an inverted V, horizontal, tilted or vertical radiator. 【Reliable Works】: Comes with a wide frequency range of 5‑35MHz, including 7MHz, 14MHz, 21MHz, 28MHz as well as amateur band. Specification: Item Type: Balun PCB Material: PC Colour: Green Rated Continuous Power: 50W PET: 100W Frequency: 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 Package List 1 x Balun PCB