Design- I have been using JBL Go Orange speaker for a while now. the colour is so eye catchy. Its looks like a large matchbox size.
Perfomance- It is loud enough for a room. You can listen to bollywood music with no problem. For EDM also it works fairly well.
Battery- It has a good battery life. I was able to use it for 8-9+ hours on full charge.
You can also attach a string to it and then attach it anywhere. I usually attach it with my bag.