Awei A710BL Foldable Noise Cancelling Wireless Headphone (BT v5.4, AUX Support) - Black AWEI Wireless Noise Cancelling Headphones，Headphones Bluetooth，20H Playtime,Hi-Res Audio Deep Bass Comfort Fit Ear Cups for Travel, Home Office Over The Ear Headphones Black Model A710BL Bluetooth Version 5.0 Battery Capacity 300mAh Music Play Time Up to 13 hours Talk Time Up to 14 hours Standby Time Up to 200 hours Charging Time Approx. 2 hours Driver Diameter 40mm Impedance 32Ω Sensitivity 98dB Frequency Response Range 20 - 20000Hz Maximum Wireless Range 10 meters