... S Pin).3.Compatible with PC Notebook mobilephone, TF card, USB flash4.Power on/off , Backward/ Vol-, Forward/Vol+, ... portable speaker with subwoofer. LCD display, Support TF/U disk playing, FM function, recharge, ANTFeatures:Excellent audio performanceBuilt-in ... Lithium battery rechargeable with computer USB Jack or AC adapter Support TF/U disk playing ,FM function (Retractable ANT) ...