Lightweight and elegant wireless earphones for everyday use, for those who value comfort and sound quality. 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: 16 , Speaker diameter: 10 mm Sound power: 27 mW Includes: USB-A / USB-C cable Supply: kraft paper gift box Dimensions: 61 x 49 x 29 mm | Box: 62 x 32 x 74 mm