Portable 2.1 speaker system with FM radio. Metal housing. USB port, SD card slot and 3.5 mm stereo connection. Connects to iPad, iPhone, MP3 player, mobile phone, laptop, etc. Rechargeable lithium battery for up to 4 hours of playback. Comes with USB cable and 3.5 mm connection cable. Size: 22.5x7.2x4 cm.