Yealink BH71 Bluetooth Wireless In-Ear Headset, Workstation, Qi Wireless charger, Wireless Charging box. Provides a high-definition audio quality no matter in the car, on the train or in the office whether connect to your smartphone, desk phone or PC. With the 4-mic beamforming noise cancellation technology, you can always be heard clearly. Features: Designed for: Executive Hybrid Worker Noise cancellation: 4-Mic Beamforming noise cancellation Adjustable ear hook: Yes Talk time: Up to 10 hours Weight: 18 grams Connectivity: Mobile/PC/Deskphone Wireless Range: Up to 250ft/75m (In Ideal Conditions) BT51: Yes Portable Case: Charging case(20 battery life) Workstation: Yes