The SBD HD9-RGB is the newest model for wireless headphones. It is a robust headphone made out of metal and synthetic material. The headband is lined with rubber for optimal wearing comfort, even for small children. Due to the foldable construction, the headphone can compacted in to a small and easy to transport size. Just like the other Silent Disco Box products, this headphone works on 3 frequencies, whereby the choice is made visible by the coloured LED lights in the ear pads. Every headphone has a power switch and a volume control. The power supply of this headphone is an internal rechargeable battery, that can be recharged with a (to be ordered separately) charger.