The Mitel MiVoiceS720 Bluetooth Portable Speakerphone (51306580) features: HD voice audio 360-degree directional microphone Functionally integrated with desk phone – volume / mute sync, pulling call to / from conference phone Connect up to two speakerphones wirelessly to extend speakerphone range and for stereo music playback Play smartphone audio from mobile with auto pause when incoming call to desk phone Intuitive connectivity through Bluetooth 4.2 technology Battery powered with USB charging (15 hours of talk time) Mitel S720 Bluetooth Speakerphone is supported with Mitel MiVoice 6920*, 6930 and 6940 IP phones Requires MiVoice Business Release 8 SPE or later Includes: Mitel S720 speakerphone and travel case Condition: New * Note: The Mitel 6920 requires a USB Blue Tooth adaplet (50008253) – sold separately