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-earWireless transmission: BT v5'3Capacity: 400 mAhApproximate autonomy: 15 hApproximate charging time: 3 hInput: USB-C, microSD, 3. 5 mmHeadphones: Frequency response: 20 Hz - 20 kHzSignal-to-noise ratio: > 90 dBSensitivity: 85 ±3 dBImpedance: 32ΩSpeaker diameter: Ø 40 mmSound power: 10mWMicrophone: Frequency response: 20Hz～3KHzSensitivity: -38 ±3 dBV/PaIncludes: USB-A / USB-C cable, 3'5 mm audio cableDelivery: in black pouch in kraft paper gift boxDimensions: Flap: 300 x 200 mm