Bluetooth Connectivity and Strong Compatibility: The ultra-portable speaker can be connected to any device which has Bluetooth enabled. It is compatible with devices like iPhone, iPod, Android phones, MP3 players and many more. It has strong connectivity for clear, uninterrupted audio.AUX and USB Port: The speaker has a USB Port for charging and an AUX port support audio input.Card Reader And FM Radio: The Micro-SD card reader is actually a music player, it can play Mp3/Wma music storage on your memory card.Rechargeable Battery: This speaker has a built-in rechargeable battery which can be charged using a USB cable. The playback time for this speaker is 2 to 4 hours once fully charged, depending on the level of volume you play music at.Surround Sound and Sound Quality: The speaker has a special combination of stereo sound and bass effect which is a distinct sound chamber structure which gives you impressive bass and perfect treble. It also comes with stereo like surround sound, so that you can watch movies in a theatre like setting.