# 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. ![Close Up Device](img/device.jpg) So I've decided to _tap_ and record the communication between the Checkpoint and the module for further decoding. ![Tapping 4400](img/tapping_1.jpg) Here is my journey trought this reverse engineering. ![Close view of tapping](img/tapping_2.jpg) Open communication Port with 115200 bps, 8N1 settings and write [Commands](CommandSet.MD). you may want to read return the keys. obviously Checkpoint has use graphics always; they upload images on every update.