Sinoteck Z12 Mini Portable Universial Color Music Speaker TF Card Mini USB FM for iPhone4 4S iPhone5 iPod Features: TF card (microSD card) U disk, plug headphones, radio Built-in polymer battery (lithium battery) 550mAH Mono RMS 3W THD = 10% 1.77 inches (foreign economic 45MM) magnetically shielded, 4 ohm 6 colors availble:please leave a message to me the color you want ,if not will random