TWS and BT 5.0.Adopting the most advanced BT 5.0 technology, the earbuds provide one-step pairing ,faster transmission speed, more stable connection and lower power consumption 9D Stereo Sound Quality.F9-10 offers a stereo and powerful deep bass with nuclear moving-coil speaker. CVC8.0 noise reduction technology reduces ambient noise and provides clear voice, which allows you to enjoy immersive sound even in the noisy environment Large Capacity Charging Box. Equipped with 2000mAh portable rechargeable charging case, it provides up to 220-hour playtime and 180-hour call time after a single full charge LED-Digital Display & Comfortable Wear.Three LED-digital screen with indicators shows clearly the battery charging status and power of each earphone and charging box.Made of skin-friendly material with ergonomic design,the earphones fit well the ear canal and reduce ears pressure,ensuring in-ear wear comfort CD Pattern Fingerprint-Touch & HD Call. Designed as CD pattern, the touch-key is creative and fashionable. Wake Siri with one-touch and both volume and music control can be done easily.And you can also enjoy HD calls with built-in microphone