Hi All

I'm struggling to find a replacement part for a portable speaker.

The part was a 'dongle' that used the USB port on the portable speaker to connect to bluetooth devices to play audio (inc microphone). It was a pretty flimsy thing that did not take long to break (speaker is at a secondary school).

I've seen adapters that use a 3.5mm jack, unfortunately the speaker does not possess a 3.5mm input. 

Ideas and links to products greatly appreciated as it is really handy to have the bluetooth option for this speaker.

Thanks