The speaker produces rich, balanced sound, the bass is especially good on resonating surfaces advantage. About Bluetooth you notice a drop in quality, the date when all I Bluetooth
I use the speaker especially with an iPod cable, at medium volume, the battery has held more than 18 hours, I thought that was incredible.
Very good mobile speaker, absolute buy recommendation.
Who value good sound quality sets but necessarily need Bluetooth Bluetooth 4.0 devices should look. With Bluetooth 2.1 others are no better than this.