Goliton&reg; Portable Cylindrical Mini Vibration Resonance Music Speaker with Micro SD/TF Card Slot FM Radio Remote Control for MP3 PC iPhone iPad iPod and other audio players with standard 3.5mm audio jacks- New Green Compatible with:PC, MP3, MP4, Micro SD, CD/DVD player, Mobile Phones, iPhone, iPad, iPod and other audio players with standard 3.5mm audio jacks. Different surfaces of different materials can produce different great textures of music Support Micro SD card/FM radio USB access to PC/mobile phone/laptop etc Playtime: 2-3 hours / Charge time: 2-3 hours;