About this item BT v5.3Chip: JL AC6983Battery capacity: charging case 400mAhearphone 80mAhUse time: 10 hours Standby time 200 hours Sizes: 87.5*64*28mm Total weight: 60.8gSupport leader-follower switching, summon for Siri, open the cover and take out the earphones to turn it on. Air conduction BT earphones.