Description: Audio experience: Using the latest Bt V5.4 technology, this wireless headset brings you unprecedented sound quality enjoyment. Built in 40mm high resolution driver unit, with a wide speaker frequency response range (20Hz-20000Hz), whether it is deep bass or clear , it can be perfectly presented, so that every melody touches the soul. Intelligent active noise reduction: Equipped with advanced active noise reduction technology, it can effectively isolate external noise, whether it is a noisy street or a noisy office, it can instantly create a quiet world for you long time? use : You can enjoy up to 50 hours of continuous playback time on a single charging. Whether it is a long distance trip or daily commuting, it can accompany you through every wonderful moment without frequent charging, and the music will not stop. Convenient charging and connection: Support Type-C fast charging interface, strong compatibility, and more efficient charging. At the same time, equipped with AUX interface, it can be easily connected even in scenes without Bt devices, and enjoy music without boundaries. Humanized design: The headset is made of ABS plastic, which is light and sturdy. The unique and convenient folding design is easy to store and does not take up space. It can be easily carried in a backpack or handbag. The headband can be retracted and adjusted to fit different head shapes. Size Chart: 16.8cmx8.7cmx17.5cm/6.61inchx3.43inchx6.89inch Package Includes: 1?? Noise Cancelling Headphones Note: Please allow slightly errors 1-2cm differences due to manual measurement.