which I like. I would caution buyers if they expect smooth installation. 4 stars Crisp sound all around, good bass and treble. The battery life is amazing, and even has a setting that allows for even longer life. I was hoping the reviews were wrong but they arent. My children and I picked this gift for my husband. Packaging, design, construction, and materials are all top notch. Beware that since these are plastic there is a bit of a squeak on each step. Fun, but I felt I was always out of bounds.