Monaural style. Work away from the desk and still maintain a wireless connection that won’t let you, or your customers, down. Enjoy superior sounding calls, even in busy offices with many wireless devices. Advanced noise-cancelling microphone and enhanced speakers deliver crystal-clear calls even in noisy offices. Up to 13 hours' talk time - and when you do need to charge, the fast charge feature powers the headset to 40% in just 30 mins. You can connect to desk phone, softphone, analog phone, and 2 Bluetooth devices. Meets Skype for Business Open Office requirements. Sold by each. Black.