Merkury ANTHEM Portable Wireless Stereo Bluetooth Speaker with Built in Microphone / Speakerphone & 8 hour Rechargeable Battery (Black)
This speaker works great. I stood on one side of the house and the speaker was still picking up media on the other end. Battery lasts a really long time and when it dies you just plug it in, I have an Android phone so I have plenty of chargers, and the speaker charges pretty quick. Crisp sound, not tinny at all.