Features: Ergonomic in-ear design, comfortable to wear, take care of your ear canal. Large capacity 3500mAh charge box, with power display, can charge for phone and taken as phone holder. BT5.0 chip, more stable transmission, simpler connection. Two independent headphones can be connected to two mobile phones at the same time. Compound crosstalk voice coil + dense filter mesh design, effectively restricts ambient noise clearly restores human voice. Fingerprint touch control of music, call, volume and voice assistant, convenient to operate. IPX7 waterproof, meets your daily waterproofing needs.