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Foldable wireless headphones with active noise cancellation (ANC), so you can focus on the main tasks of your day or relax listening to your favourite music without external noise. The headphones can also be used via an audio cable.Material: recycled ABS (100% rABS) | Type: over-ear | Wireless transmission: BT v5.3 | Capacity: 400 mAh | Approximate autonomy: 15 h | Approximate charging time: 3 h | Input: USB-C, microSD, 3. 5 mm | Headphones: | Frequency response: 20 Hz - 20 kHz | Signal-to-noise ratio: > 90 dB | Sensitivity: 85 ±3 dB | Impedance: 32Ω | Speaker diameter: Ø 40 mm | Sound power: 10mW | Microphone: | Frequency response: 20Hz~3KHz | Sensitivity: -38 ±3 dBV/Pa | Includes: USB-A / USB-C cable, 3.5 mm audio cable | Delivery: in black pouch in kraft paper gift box | Dimensions: