[9d Surround Sound]: Using Upgraded Dynamic Coil Speakers To Enhance The Sense Of Depth, Presence And Space, And Present A ThreE-Dimensional Surround Effect Like A Live Scene. [lightweight & Comfortable]: Follow The Ergonomic Shape Conscept, AlL-IN-One Design, Fit The Cochlea, Let The Headset Wear Firmly, And Experience LonG-Term Stable And Comfortable Wearing, Easy To Carry. [pick Up Power On Automatic Pairing]: Smart Touch Operation, Remove The Headset From The Storage Box.the Headset Will Automatically Turn On And Automatically Pair, No Operation Is Required, Easy And Fast To Use. [led Power Display]: Intelligent Led Digital Display, Charge And Discharge Instructions, More Intuitive Prediction Of Battery Life. [flashlight Design]: With A LargE-Capacity Battery, The Traditional Design Of An Emergency Flashlight Is Overturned. specification: bluetooth Model: M18 Bluetooth Headset bluetooth Version: 5.1 headphone Speaker: ?8mm headphone Battery Capacity: 50mah tra