Good things come in small packages and the Extreme Connect is no exception. With two front facing full-range drivers and rear facing passive bass radiator, this system packs a punch! It"s fully portable, with a Built-In rechargeable lithium-ion battery that lasts up to 10 hours. The Extreme Connect is the perfect audio companion for both indoor and outdoor activities. The rubber trim on the top and base panels provide extra protection from bumps and scratches. Connect any Bluetooth enabled device for wireless audio playback or speakerphone functions. Additional connectivity includes Micro SD port (32GB max) USB streaming and 3.5 Auxiliary.