Yealink BH71 Bluetooth Wireless In-Ear Headset, Workstation, Qi Wireless charger. The Yealink BH71 Workstation Bluetooth Wireless Business Headset System provides a high-definition audio quality while you are commuting or in the office, whether connecting to your smartphone, desk phone or PC. With the 4-mic beamforming noise cancellation technology, you can always be heard clearly. Features: Designed for: Office Worker Noise cancellation: 4-Mic Beamforming noise cancellation Talk time: Up to 10 hours Connectivity: Mobile/PC/Deskphone Wireless Range: Up to 30m