The SJ-MR200 is a full functional portable playback/recorder with line/mic/optical inputs. It can be controlled via a cable remote controller where you can hook different earphones listening musics. The controller has LCD displays and back light so you can use it in the dark. The system is powered by single 1.2v bar battery or single AA alkaline battery (with the adapter attached). The price includes all the items in the pictures. The bar battery is dead and unusable. The system is working well with AA battery adapter. It is good for real use or collection.