Portable Bluetooth Boombox Speaker with FM Radio, USB &TF, Karaoke functions, and designed with 20W 2 speaker configuration with loud stereo sound. Features a built-in 2000 mAh rechargeable lithium battery, which can continuously play for 24 hours when fully charged. Play MP3 format music from TF card, U disk. Connect 3.5mm stereo audio cable to speaker socket "LINE IN", can enjoy the music from mobile phone, MP3, MP4, PC, APPLE POD and other audio devices. Comfortable handles and removable shoulder strap, and measures 13''x4''x10.3''. You can take the speaker anywhere. Custom full color graphic to make it a perfect item to show people your company's emblem, slogan and message.