A power bank is a portable device designed to store electrical energy and recharge electronic devices on the go. It typically features USB ports for charging smartphones, tablets, and other gadgets.
Touch screen has been added to the traditional headphone battery compartment to display more device information, making it more convenient to operate and use.
The earphone's LCD touch screen and digital display provide an easy-to-use interface for users to control their music and track their battery life, making it convenient for users who value "easy navigation".
