•Suitable for listening to audio and calling. •Charging interface: Micro USB •Battery: 3.7V/400mAh •Charging indication: Red LED light •Standby time: Average 400 hours (Bluetooth function only) •Working time: Bluetooth function only: 10 hours, Noise cancelling + Bluetooth function: 15 hours •Charging time: 2-3 hours •The depth of the noise reduction: 23DB±2 •Speaker sensitivity: 105±3db
