Hi
I have for sale a Marsboy, wireless bluetooth speaker for sale.

I have listed it as new, i have only taken it out of the box to check it and try it.

It has a built in rechargeable battery so it's not tethered to a plug.

Unfortunately it's not for me, maybe it might be for you though.

MARSBOY 5W ORB WIRELESS BLUETOOTH 4.1 SPEAKER REVIEW
With built-in colour-changing LEDs and seven programmable modes, the Marsboy B2 Orb Wireless Bluetooth Speaker can turn your bedroom into your own private disco. We review the Marsboy Orb Wireless Bluetooth Speaker. Also see: Best cheap Bluetooth speakers.
The Marsboy B2 Orb Bluetooth Speaker costs £38.99 from Amazon.
It has a built in battery, it has a charging lead and a 3.5mm jack plug lead so you can plug it into your phone.
It has a slot for a micro sd load on your music and it plays it back through the orb.

If you see my adds then they are still for sale.