With the QCY T9S you can enjoy excellent sound quality to the fullest. Thanks to the Extra Bass and Surround Sound, you can immerse yourself in your favourite music. Thanks to Noise Cancelling, noise and background noise are significantly reduced, which enhances the listening experience. Thanks to Bluetooth 5.0, transmission is fast and the connection between the earbuds is extremely stable.The QCY T9S has a large 43 mAh battery with a battery life of 4 hours. Using the Quick Charge box with a 380 mAh battery, the earpieces are fully charged within 2 hours. This is possible 4 times in total. So with a charged charging box you can use the earphones for up to 20 hours! Thanks to the magnets, the earplugs fall in smoothly and smoothly. The earplugs are automatically switched on and connected when the charging box is opened