Headworn Bluetooth Earphones, Wireless Stereo Foldable Card, Plug-in Cable, Radio, Mobile Phone, Computer, Universal Features: Easy operation: Comfortable of buttons, easy to operate and enjoy convenience whether listening to music or making calls. Adjustable metal head beam: Metal wire drawing, using invisible steel bars to penetrate the entire head beam design, which can be adjusted in multiple stages according to the head shape, with natural expansion and contraction. 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 bass power, such as clear and realistic sound 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 ultra-low delay sound and picture. Foldable design allows for easy storage and easy portability: The lightweight and compact body features a foldable design that makes it easy to fold when you're not paying, making it easy to carry. Product Bluetooth version: Jerry 5.0V Transmission distance: 10 meters Usage time: 5-10 hours Standby time: 5-8 minutes Automatic shutdown Battery capacity: 200mAh rechargeable lithium battery Charging interface: Android port Charging time: 2 hours Functions: adjust audio stars, songs, incoming calls, reject incoming calls, hang up calls, Bluetooth playback, phone replay, Bluetooth callback, voice prompt, battery display, EQ, English broadcast Package: 1 Bluetooth earphones, 1 Data cable, 1 instructions