Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
Sound quality superb.. Enough battery backup.. You'll get 4hr of backup in deep bass mode(50-60% of volume) and 5 to 5.5 hr of backup in normal mode(60-70%volume).. Good bluetooth connectivity.. And at last, portability wise it is very much good to me..
When delivered it was working satisfactorily. This went out of order in 21 days. Wastage of of money. Either duplicate or factory second and rejected product. When went to service centre of JBL, suggested by Amazon and JBL, I found that many are struggling with this speaker.