Jiefanglu Ultra-Portable Mini Multimedia Speaker Player,USB Powerful Sound 3D for Computers /Laptops/ Tablets with USB port! Great Holiday and Christmas Gift Black Built-in active amplifier, pure, beautiful sound, sound stirring Meet the acoustic aesthetic design principles, soft sound, independent volume control operation more convenient Built-in high-quality audio decoder chip, 3D surround sound bring the perfect musical experience Details oriented, persuit of perfect, exqusite and delicate everywhere