Metal Color Bluetooth Headphone Stereo Card Wireless Headphone C-port Gift Features: Easy operation: Comfortable of buttons, easy to operate and enjoy convenience whether listening to music or making calls. Adjustable metal head beam: Metal drawing, using invisible steel bars to penetrate the entire head beam, which can be adjusted in multiple stages according to the head shape, with natural expansion and contraction. The game has no delay, stable links, and continuous lines: play the game, listen to sound and position recognition, and synchronize high-definition videos with-low delay sound and picture. You don't need to connect a card to listen to music: supports card playback, plug and play without connecting your phone. Enjoy listening wirelessly: The connection distance can 10-20 meters using Bluetooth 5.0 chip, and the transmission is faster, the power consumption is lower, and the connection is more stable. Excellent audio quality for ear listening: 40mm unit with strong power, such as clear and realistic sound quality in person and, presenting a different auditory experience for you. Foldable allows for easy storage and easy portability: The lightweight and compact body features a foldable that makes it easy to fold when you're not paying, making it easy to carry. Product Description: Transmission distance: 10 meters Battery: 400mAh Function: Adjust volume, songs, calls, reject calls, hang up calls, Bluetooth playback, phone replay, Bluetooth callback, voice prompt, battery display, FM, TF, EQ, English broadcast Package: 1 × Bluetooth earphones, 1 × Data cable, 1 × instructions