Portable Bluetooth Whale&reg; Micro Mini Speaker, Powerful Loud and Clear Sound with Bass, Built in Mic, Works With All PC, iPhone, iPad, iTouch, Samsung, HTC, Blackberry, Nexus, All Phones and MP3 Players (Pitch Black) Bluetooth Speaker with Loud Crisp Sound, Solid Bass and Dual Volume Control for Large Room or Dual Room Usage Compatible with iPod, iPad, Tablet, Smartphone, MP3 players, CD players, Laptop, Desktop 3 connection modes: Bluetooth Wireless, AUX Line-in, Micro-SD/TF Card Compact size with Strong Sound makes it a prime choice for Home, Work, Gym and Travel needs Powered by built-in rechargeable battery or USB port. Battery Play time - 4 hours