?【Technology & Digital Display】Based on the unique panoramic space capsule design concept of TOZO Industrial Design Lab's, it perfectly demonstrates the contour of internal earphones and charging box. And the smart LED digital screen showing the remaining power of the case by the number on the screen, which can intuitively reflect real time power to ensure timely charging and embody the sense of technology.?【High-Fidelity Audio & Crystal-Clear Call】 Poor call quality when with headset? TOZO Crystal Buds are equipped with 4 microphones to reduce ambient noise through Dual-microphone AI algorithm, so you can always enjoy High-fidelity audio and Crystal-Clear call even in noisy environments, no longer worry about poor call quality when wearing headphones.?【Bluetooth 5.3 & High-quality Sound】Equipped with Bluetooth 5.3 chip and true wireless Bluetooth technology, so the connection between TOZO Crystal Buds and other devices is very stable; Meanwhile, with 6mm diameter loud speaker, the original sound is a perfect recovery, making the treble sweet and clear, the bass is strong and powerful.?【IPX8 Waterproof】IPX8 water and sweat resistant waterproof nano coating is adopted to effortlessly protect the earbuds from heavy rain or sweat during intense workouts and all-weather conditions.?【Long Endurance】TOZO Crystal Buds support wireless charging. The earbuds on a full charge can meet 9 hours while listening volume 50%; Item No. BB15957