It's small, comfortable, and doesn't put pressure on the ears. High sound quality and more evenly distributed frequencies are features of PU composite diaphragm acoustic technology. Real-time power indicators for the charging box and earphones can be seen on an intelligent high-definition digital display. Low power consumption, a quicker and more reliable connection, and the use of the Bluetooth 5.3 chip DNS call improvement, clear sound quality, precise voice pickup, and noise reduction Audio and video synchronization, low latency technology, and 65 ms Easy to use and broadly compatible with Windows, iOS, and Android systems Bluetooth: V5.3 Power Source 35mAh capacity, 500mAh charging box 7 hours of playback at 70% volume Time Spent Charging: Around 1.5 hours About 42 hours is the earbud standby time (connected). Technology: High Fidelity, HiFi Super Bass Quality, Touch Control Sound IP54 Water Resistant