Open-Ear Comfort & Secure Fit: Open-ear design ensures comfortable wearing, keeps you aware of surroundings, perfect for sports and outdoor activities. ANC Active Noise Cancelling: Advanced ANC noise reduction technology effectively blocks ambient noise for clear and immersive audio. Bluetooth 5.4 Stable Connection: Equipped with Bluetooth 5.4 chip for fast pairing, stable transmission, low latency and low power consumption. IPX5 Waterproof & Dustproof：IPX5 waterproof level resists sweat and rain, durable for running, fitness and daily outdoor use. HiFi Heavy Bass & Long Playtime：Delivers powerful heavy bass and HiFi lossless sound; built-in LED battery indicator shows power clearly for ultra-long using time.