I am selling these earphones because I purchased new ones. They function without any problems. They have hardly been used. I will disinfect them with alcohol before shipping. Thank you for your consideration. Wireless earphones with high-resolution audio and active noise canceling. - Model Name: Liberty 4 Pro - Brand: soundcore - Included Accessories: 6 types of ear tips - Features: High-resolution audio, active noise canceling - Battery Life: Up to 40 hours - Water Resistance: IPX4 Thank you for looking.