Features: -Automatic connection: Automatic pairing when power on, connect and pair instantly when you take it, and power off when you put it in the charging bay, simplifying complexity.  -It can charge the mobile phone: the large-capacity charging compartment can not only charge the earphones, but also battery life of the mobile phone.  -Lightweight and comfortable: It is comfortable to wear as if there is nothing, and it fits the ear canal more comfortably. It will not be thrown off if you wear it for a long time, and the call and music will be clearer.  -Magnetic charging bay: The mini-energy bay has a built-in large-capacity lithium battery to escort your wireless music.     Specifications: Model: A22.  Bluetooth version: 5.2.  Single headset: 40mAh.  Charging box: 2200mAh.  Talk time: 3~4 hours.  Battery life: 120 hours or so ( to be used with charging cabin).  Phone calls time: 120 hours or so(to be used with charging cabin).  Charge the headset: 40 times or so.  Input current: 5V 1A.  Control Touch: Support.  Microphone: Yes.  Size: 86.5*48.5*30mm.     Package Included: 1 pair * Earphone.  1 * Charging Case.  1 * Charging Cable.  1 * Manual