Imagine you have a special device in your pocket that can help you find things that you might have lost. This device is called a mobile RFID.
Now, let's say you have a toy car that you want to keep safe. You attach a special tag to the car which has a unique code.
When you want to find your toy car, you take out your mobile RFID and press a button. This sends a signal to the tag on your toy car, asking it to respond with its code.
The tag on your toy car responds back with its unique code, and your mobile RFID checks its memory to see if it has that code stored.
If it does, your mobile RFID shows you how far away you are from your toy car and in which direction to go to find it. This helps you find your toy car easily and without any trouble.
In summary, mobile RFID is a device that helps you find things that you might have lost by sending signals to tags attached to those lost items and receiving responses, which in turn tell you how far or close you are to the lost item.