Harman Kardon Onyx Studio 2 Wireless Bluetooth Speaker System with Rechargeable Battery and Built-In Microphone - White (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new, with limited to no wear. The refurbishing process includes functionality testing, inspection, and repackaging. Built-in speakerphone with Harman VoiceLogic echo and noise cancellation Wireless Bluetooth connectivity Rechargeable Li-ion battery Auxiliary Input