Master-level sound effects, pulse DT4.0 sound transmission directional lossless technology Mini design comfortable to wear, fits both ears, very light, and securely fits the earhooks, suitable for long-term wearing without discomfort to the ears Bluetooth 5.3 ,8D surround sound, 5.3 binaural chip, large capacity,intelligent digital display, long battery life of 58 hours type of true bone conduction, 360° no openings, no sound leakage, bone conduction sound generation principle, you can listen even if your ears are blocked, no sound leakage, privacy protection Strictly skin-friendly and highly elastic materials, can be easily folded without deformation, and will not hurt when worn for a long time Product Name:Wireless Bluetooth Headset Bluetooth Version:V5.3 Transmission Distance:10 Meters Mode Of Wearing: Wear Without Ear Battery Capacity:400 Mah Endurance:About 58 Hours Charging Time:About 1.5 Hours Charging Port:Type-C color:Black material: plastic Package Contents: 2 x Earphones 1 x Charging cable 1 x Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.