With the advanced Bluetooth 5.3 technology, these bluetooth headphones offer a stronger and more stable signal. Enjoy uninterrupted phone calls and immersive video experiences with almost negligible delay. The headphones automatically connect to the previously paired device when you open the charging case, ensuring effortless pairing.380mAh charging case, the charging case is compatible with Type-C interface, supports wireless earbuds to be fully charged 6-8 times, and each earbud can be played for 8 hours on a single charge, allowing you to enjoy more than 48 hours of music time. In addition, the smart LED power display inside the case shows the remaining power in real time.Weighing only 0.1 ounces, these sport earphones are made of premium soft silicone material for a comfortable fit during sports activities. providing a painless and harmless experience. With an ergonomic surround , these sports Bluetooth headphones stay securely in place while running, dancing, or wearing glasses.CT05 wireless earbuds bluetooth are equipped with sensitive touch control panels on both the left and right earbuds,Whether you're a beginner or a pro, all functions are easily accessible. These versatile in ear earbuds can be used together or separately, perfect for sharing with your love or friend while enjoying music or a movie together.IPX7 waterproof can prevent water immersion and protect headphones even during washing, sweating, splashing, or sudden rain. It is the most suitable sports earphone for activities such as sports and practice.