... lithium battery (included USB power cable) In the decoding TF card, ready to use playback pause, adjust volume, select the song ... stories, listening to music, morning exercise choice for the elderlySmall size, big volume!Go out to play, picnic essential! Sound quality ... IN audio input line, do mobile phones, laptops, desktops, MP3 \ MP4 external speakers.Speakers can be accessed by computer, phone ...