I read the reviews and decided to order these. I wish it is rechargeable battery power but the regular battery works just fine. These are way too small. Casualmente usé el microondas al mismo tiempo y botó la pastilla, lo que me hace pensar que si consume mucha energía. The sound quality is quite good for the price I paid. The eardrum mesh are something that have changed. I have small hands, sons hands are large, and yet we both find the mouse very comfortable and easy to use. I didnt exptext them to have actual laces though, I thought they were purely slip on with fake laces. Los m-200 no tienen tanto subgrave, y suenan mas claros. Massive W!