About this item 【HiFi Lossless】HiFi lossless subverts your sense of hearing, with sufficient low‑frequency volume, accurate positioning, low sound coloration, and medium and high‑frequency layers are distinct. 【Low Power Consumption】Advanced Bluetooth 5.0 chip, low power consumption, fast transmission, stable connection. 【High-definition Sound Quality 】Using a 40mm subwoofer driver unit, it can express extremely explosive heavy bass, deliver a thick and powerful sound quality, and reduce sound distortion in the full frequency range. 【Double Noise Reduction】Built‑in high‑definition microphone dual noise reduction technology, making calls more convenient. 【Foldable】Fold and store at will, stretch freely, ergonomic design, long‑term wear and no pain, fine‑tuning design, no need to worry about pinching hair when wearing.