Wireless earphones with active noise cancellation (ANC), so you can concentrate on the main tasks of your day or just relax and listen to your favourite music without external noise. Material: Recycled ABS (100% rABS) Transmission: BT v5.4 Input: USB-C Capacity: earbuds 50 mAh, charging case 500 mAh Approximate battery life: earbuds 10 hours combined 40 hours Charging time: 2 hours Frequency response: 20-20KHz Signal-to-noise ratio: 102 dB Sensitivity: 112dB+/-3dB Harmonic distortion: 3% Impedan