Specification itel N82 bluetooth headset Bluetooth version: V5.0 Battery:300mAh rechargeable battery Charging portmicro USB Speaker Driver Units:40mm,100db3db Standby duration 40 hours Feature of over ear bluetooth headset: Ergonomic design, more comfortable to wear Bass enhancement Foldable and stretchable design,portable to take Soft snug leather headband Immersive bass Support SD card use what"'"s in the box: 1 x N82 headset 1 x micro USB charging cable 1 x instruction Product model: N82 Bass enhancement Ear wrap design Large And Softer EarmuffsHighly elastic protein earmuffs,good breathability,no burden to wear Smart Bluetooth 5.0 Stable ListeningSUse Bluetooth 5.0 version, wireless transmission accurate without delay, to ensure clear and smooth sound Quiet and Immersive Enjoy Live Performances Anywhere and Anytime Lightweight Design only 200g