I purchased these in August 2024 and used them for about two months before buying different earbuds, so I'm selling them now. I used separately purchased ear tips, so the included ones are unused. Functionality has been confirmed. The battery charges without any issues. The following is an automatically generated description: High-quality wireless earphones supporting LDAC and aptX Adaptive. - Model Name: EarFun Air Pro 4 - Features: ULTRA ANC - Accessories: Charging case, ear tips, USB cable, manual - Sound Quality: LDAC, Qualcomm aptX Adaptive, Hi-Res Audio - Awards: VGP 2024 GOLD Award Thank you for looking.