Dual Mic Call Noise Reduction: Utilizing four microphones with advanced call noise reduction technology, effectively filtering out external noise during calls for crystal-clear conversations Extended Battery Life of 25 Hours: Despite its compact size, it boasts a large capacity, providing up to 25 hours of usage when paired with the charging case Fashionable Gradient Craftsmanship: Featuring a gradient UV process that exudes youthful vibrancy and style Bluetooth 5.2 Version: Equipped with the latest Bluetooth chip for a more stable connection High-Fidelity Sound Quality: Employing composite diaphragm speakers to reproduce live sound, delivering an immersive music experience Everyday Waterproof: Meets daily waterproof standards, providing convenience for your on-the-go lifestyle Specification: Model: EM412 Bluetooth solution: JL6973 D4 Bluetooth version: V5.2 Frequency range: 2.4-2.48GHz Transmission distance: 10M Headphone battery capacity: 30mAh Charging capacity: 380mAh Running time: 5H Endurance: 4 times (REF) How to wear: In-ear type Functions: Listen to music, telephone, ENC noise reduction