USB to Micro USB Charging cable with a 3.5 mm audio jack. This is a direct replacement part for the charging cable that comes with the ZX100 Mini portable speaker with Rechargeable Battery and Enhanced Bass Resonator (for units sold after December 2012). Note: This cable is for use with ZX100 with a Micro Charging port. Please contact Kinivo Technical Support for verification of your charging port. Key Features 3.5 mm Audio jack extension cable to connect multiple speakers USB to Micro USB for Charging and connecting multiple speakers What"s in the Box - 1 USB to Micro USB to 3.5mm Charging Cable