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. 1-Year Warranty and A+ customer service.