The USB Music Projector is a multimedia player. It allows you to play media files like the play MP4(H264), MOV(H.264), AVI(H.264, MPEG4, MJPEG), JPEG, BMP, MP3, WMA and WAV files from any SD(HC) memory card. With the built-in projector, you can view your video masterpieces with loved ones wherever you want to. It's a rechargeable lithium ion battery. Lets you enjoy music, video or movie on the go.