JBL GO 2 portable Bluetooth speaker is the best speaker which has many features like,
# water proof.( actually I own one speaker and I have tried it in a swimming pool it's totally mind blowing. it's just totally water proof)
#good battery backup.( if I charge it once it runs more than a day. It has got a awesome battery of 20000mah. It's battery backup is totally cool)
#awesome sound quality. ( this thing is a beast it is small in size but even if I put the volume at it's max I hear total clear music. no cracks in music. It's like a small box with big surprise)