iLuv SmashBox Pro 3.5mm Aux Portable Speaker Case with Hands Free Calling (Blue) Powerful built-in speakers allow you to hear your music with depth and clarity Protect your music player with sturdy and convenient zipper case Built-in microphone for hands-free speakerphone capability External buttons to answer/end phone calls and control power, play/pause and volume Ideal for iPod, iPhone, MP3 players and smartphones Compatible with any audio devices with 3.5mm jack Hanging clip, carabiner, and Velcro strap for all-purpose portability Operates with two AA batteries (not included)