Wireless Speaker Mount compatible with most 8'-12' diameter portable speakers. Takes a few seconds to attach to your bike frame, golf cart, or any other rail. Comes with three adjustable Velcro straps that are suitable for most railings 5-7' in diameter. Anti-vibration pad absorbs shock, preventing speaker from rattling. Made of non-slip material, which provides a secure fit of the mount and the speaker. Perfect for Treblab HD7, Treblab HD77, Treblab FX100 speakers.