AirLink101 Portable Bluetooth Speaker - Gray (AMS-3000G) Built-in Lithium Ion battery for up to 5 hours of wireless playback MicroUSB charging port and 3.5mm audio jack for universal connectivity and easy charging Engineered for sound - Strong bass and clear highs produce an exciting audio signature Speaker Output: 3 watts, 40mm driver System Requirement: PC/Mac, MP3 players, smartphones, and tablets