# EZIO-G500 On Checkpoint 4x00 series, there is a graphics LCD display with some arrow keys and 3 LEDs. I wasn't able to find many information for this specific modules around the web. ![Portwell G500](https://portwell.com/im/ca/EZIO-G500-v.jpg) So I've decided to _tap_ and record the communication between the Checkpoint and the module for further decoding. Here is my journey trought this reverse engineering.