I believe you have had a headache about carrying mobile phone cards, card readers and chargers. They are tiny and can be easily lost. This storage box perfectly solves this problem. Although it is not large, it can hold a lot of things. Even better is that it is also a wireless charger, you only need to connect it to a power bank, and it can charge your mobile phone and other wireless devices.
You can also open it and put it on your phone as a stand, which is very convenient.