Lightweight and elegant wireless earphones for everyday use, for those who value comfort and sound quality. The charging case has a digital display showing the battery level and the maximum combined autonomy (case and earphones) is approximately 12 hours.Material: Recycled ABS (100% rABS) | Wireless transmission: BT v5.4 | Input: USB-C | Capacity: earbuds 30 mAh, charging case 200 mAh | Approximate battery life: earbuds 4 hours, combined 10 hours | Approximate charging time: 1 hour | Frequency response: 20-20KHz | Signal-to-noise ratio: 102 dB | Sensitivity: 93dB±3dB | Harmonic distortion: -92.4dB@1KHZ 32ohm | Impedance: 16Ω, Speaker diameter: 10 mm | Sound power: 27 mW | Includes: USB-A / USB-C cable | Supply: kraft paper gift box