SonicGear Airphone ANC 2000 Active Noise Cancelling Headphone – Black/Gun Metal

Specifications
-Bluetooth Version: V5.0 + EDR
-Driver Size: 40mm
-Impedance: 32?
-S.P.L: 96±3dB
-Rated Power: 25mW
-Frequency Response: 20Hz-20KHz
-Wireless Operating Range: up to 15m

Active Noise Cancellation
-Noise Reduction Specification: 6 x 2.2mm
-Noise Reduction Frequency Range: 40Hz-600Hz
-Max. Noise Reduction Level: 20dB ± 2dB
-Noise Reduction Central Frequency: 100Hz-300Hz

Rechargeable Battery
-Built-in Rechargeable Battery: 400mAh
-Working Time ANC on: up to 15 Hours
-Working Time ANC off: Up to 24 Hours
-Standby Time: Approx. 100 Hours
-Charging Time: 3 Hours

Microphone
-Built-in Unit: 4 x 1.5mm
-Directivity: Omnidirectional
-S.P.L: -42±3dB
-Impedance: ?2.2k?
-Frequency Response: 100Hz-10KHz