✔Blocks out background noise during calls and improves your voice quality at the same time. Voice calls with the quality of face-to-face conversations. ✔Regardless of traditional charging via USB Type-C, you can simply place the case on a wireless charging pad for fast wireless charging, or use your Huawei smartphone for reverse charging. ✔Dolphin Bionic design fits well inside your ears, giving you more comfortable and stable wear, while delivering deeply focused sound in your ears. Open design ergonomically designed for maximum comfort. ✔Equipped with Bluetooth version 5.1 SOC, the world's first certified version of dual-mode low-power Bluetooth technology, Huawei Isochronous dual-channel transmission technology, and a leading 356MHz audio processor.