TenCloud External Loudspeaker for iPod iPhone iPad TV PC MP3 MP4 PSP Tablet Laptop Universal Speaker Portable Voice Box SoundBox Black Full fre-quency loudspeaker made of 100nm AlTi comes with passive radiator and waterproof silicone cover Work with its built-in li-ion battery not from devices it plug in Integrative one-key design for operation simplification, auto power-off for 5min no audio signal input Compatible with all major devices support 3.5mm audio plug, iPad, iPod, tablets, laptops, PCs, MP3, MP4, PSPs, Smart Phones Portable for extensive uses while you are listening to music, seeing movies, playing games, driving follow GPS, conference calling etc