I bought this because of the battery power to use outside by the pool. The battery charge holds for a whole day of swimming. I connect my Sirius stilleto(I just needed to get a connector cable) and enjoy satellite radio with no outlet needed! The size is very compact and easy to take wherever you go. Works perfect with the ipod classic and nano. Charges them too when connected to an outlet. The sound is not Bose quality but very good considering the cost of the product. Highly recommend this product - great buy for the money!