【Advanced ANC Technology】Featuring Active Noise Cancellation (ANC) with a depth of -43dB, these headphones precisely calculate and intelligently cancel environmental noise for an immersive listening experience. 【Premium Sound Quality】Equipped with 40mm titanium-plated dynamic drivers, enjoy HIFI-level audio with rich, layered, and dynamic stereo sound. 【Stylish Design】Embracing a neutral color palette with premium materials and curved aesthetics, these headphones transform simplicity into a sexy, tech-savvy design language. 【Exceptional Battery Life】With up to 55 hours of playtime on a single charge, these headphones ensure long-lasting entertainment. When the battery is depleted, use the included audio cable for continued high-resolution audio enjoyment. 【Dual Device Connectivity】Connect to two devices simultaneously, allowing for seamless switching between audio sources. 【Clear Call Quality】Enhanced with ENC (Environmental Noise Cancellation) technology for crystal-clear voice communication during calls. 【Ergonomic Comfort】Featuring an adjustable, retractable design to fit various head sizes comfortably for extended wear. Specifications: Bluetooth-compatible Version: 5.4 Transmission Range: 10 meters Material: ABS Battery: 3.7V, 500mAh Playtime: Up to 55 hours Speaker Size: Φ40mm Charging Time: Approximately 3 hours Package included 1 x Bluetooth-Compatible Headphone 1 x Charging Cable 1 x Audio Cable 1 x English and Chinese User Manual Specifications Brand N/A Color Dark Brown Packaging Type Colored Box Plug Type (For Supply) N/A User Manual (Language) English and Chinese Gross Weight 0.426kg Volume Weight 0.414kg Package Length 14.500cm Package Width 15.000cm Package Height 8.500cm