... micro-speaker, insure the sound quality.Circular design, exquisite appearance, with 6 buttons.Buttons definition: "MODE", "Stop/Pause","EQ". "Back ... electronic devices like MP3, MP4, mobile, Portable CD Players, Notebook PC etc.Bottom with red or blue LED light.Build-in ... Including 1 * Audio Speaker1 * Audio & USB cable mini portable speakers for mobile phones with usb/sd/TFcard/fm radio heavy bass