Satechi BT Wireless Bluetooth Portable Speaker System for MP3 Players, iPhone, Android Phones, and iPad Portable Bluetooth wireless speaker with compact vacuum bass design streams music and hands-free calls. Bluetooth Ver. 2.1: 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, Play/Pause, Next track, Compatible with Apple iPhone 6/5S/5C/5/4/3GS/3G/iPod touch G4/iPad/Macbook/Macbook Pro/Motorola Atrix/Droid X/Droid 2/Droid/Milestone/Samsung Galaxy S2/S3/S4/S5