Spider XtremeBass AMP (Black) Compatible with any MP3-Player or any equipment with line-out function Output Type: Normal / Bass Rechargeable battery via USB cable with ~12 hours battery life at full charge and 1.5 hour charging time Rechargeable battery via USB cable with ~12 hours battery life at full charge and 1.5 hour charging time Compatible with any MP3-Player or any equipment with line-out function Plus a 1 Year Warranty