The desktop charger complements the cisco unified wireless ip phone 7925g 7925g ex and 7926g models providing a full duplex speakerphone for hands free communication and desktop charging it provides connectivity to the phones through a bluetooth interface with audio control provided by the keys on the phone while it is located in the dock in addition to charging the phone while in the dock the desktop dock also charges a spare battery if fitted into the battery slot on the rear this dock