Works with the same principle as the Diamond BB-7V vertical antenna. ROS above 3 MHz depends on nearby objects and is 2:1 or better. In some bands, that requires a simple tuner built in many radio is usually sufficient. The antenna is a broadband model and works on all amateur bands and more. Simple installation, no agreement is required. Connector PL female. Weight 0.8 Kg. BB-6W antenna is long just 6.4 m and bears max. 250W PEP. Of course it can also be used only for receiving requiring no tuners. Includes insulators and nylon rope from 2 x 5 m.