Overview: Upgraded LED soft light display, the remaining power of the earphones can be seen at a glance without opening the cover Stable full-core upgrade 5.3-core upgrade chip, more stable transmission, easier connection, and smoother calls and songs. Graphene composite diaphragm is light in weight, fast in response and high in fidelity Micro charges faster and takes longer Noise-cancelling microphone for clear and easy speech in any environment. Specification: Item model number: Yd03 Battery life: 4~5 hours Bluetooth version: 5.3 Transmission distance: Within 10 meters Charging compartment size: 80.8*55*30.7 mm Headphone size: 24* 16.8* 14.5mm Packing list: Earphone*1+usb data cable*1+instruction manual*1