Battery life is solid, and quality wise they feel pretty good. No need to assemble, sturdy & stable. My daughter loves her slippers. I can say that the audio is better than many poorly made headsets, but for the price they are subpar. Im usually a fan of Anker products after excellent customer service replacing a damaged USB switch free of charge, but this $35 item I simply cannot endorse, and sadly plan to return it. Ill order another pair when these wear out. Its compact enough in our tiny house to fit in the small area we had available and now I have an attractive "coat closet" where before I had none (our house is 820 sq ft - not a lot of closets, period! Ears are like fingerprints ( no two alike). This detail was not in the item description of the shoes or the purchase. Like them wear all the time, wish they came in different camo colors