Portable Bluetooth wireless speaker with compact vacuum bass design streams music and hands-free calls. Bluetooth Ver. 2.0: Hands-free, AVRCP, A2DP, automatic connection, only one time pairing Easy charging with integrated Li-Ion-battery (USB chargeable) for max 6 hours playtime Multifunctional three buttons allow Power on/off, Answer call, End call, Play/Pause, Next track, Compatible with Apple iPhone 4 / 3GS / 3G / iPod touch G4 / iPad / Mackbook / Mackbook Pro / Motorola Atrix / Droid X / Droid 2 / Droid / Milestone... and more... Previous track, Volume up, Volume Down, Audio mode