Yealink BH71 Bluetooth Wireless In-Ear Headset, 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: Road Warrior Noise cancellation: 4-Mic Beamforming noise cancellation Adjustable ear hook: Yes Talk time: Up to 10 hours Weight: 18 grams Connectivity: Mobile Wireless Range: Up to 130ft/40m (In Ideal Conditions) Portable Case: Carrying case (without built-in battery)