CVC8.0 Noise Reduction and LED Battery DisplayThe built-in microphone uses advanced CVC8.0 noise reduction technology, which helps reduce environmental noise and echo, thereby improving real-time voice sound during a call, while maintaining the sound quality of HiFi music.Battery percentage of case will be displayed on the front of the charging case,and separate icons will show the remaining charge of the left and right earbuds.Up to 200H Playback Time and Bluetooth 5.3 It only takes 2 hours to fully charge the 2200 mAh case,and providing earbuds with up to 200 hours of looping playback time. And the earbuds provides up to 6-7 hours of single play time after 1H single charge.Use the latest 3rd Bluetooth 5.3 chip to provide faster and more stable signal connection and lossless sound transmission.HiFi Stereo Sound Effect and Two Main Earbuds DesignThe wireless earbuds built-in high-quality audio chip can preserve the original sound of the music to the greatest extent, providing clear high-pitched and strong bass stereo high-fidelity sound quality. The dual main ear transmission design transmits signals to the two earbuds respectively, which means that you can use two earbuds at the same time or use one earbud at random. These two methods bring continuous and convenient music enjoyment.IP7 Waterproof and Wide CompatibilityBuilt-in nano-waterproof coating, class 7 waterproof design, can prevent the water from entering the earbuds after immersing in water, suitable for running even in rainy days, and suitable for sweating in the gym or various outdoor sports(such as walking,hiking, jogging, etc.)These earbuds are basically compatible with most Bluetooth-enabled devices, such as phones, tablets, laptops and computers.