... Transfer rate4. Support the songs choosing tracks5. Support 12V power, and support 2 speakers.6. Built-in 110 Bird sound,But ... battery, can play for 15 hours or so10.Accessories: Remote control, Battery,Charger, USB cable, User'smanual, White -box11.Main Markets ... birds, Pls use with caution. Bird voices for decoy bird and hunting.best price and quality.