OBDSTAR X300 PRO3 key master can update online 1 year for free, and the article will tell you how to update.
How to update software for X300 Pro3?
2.1 Update Tool software installation
Download the update tool and diagnostic software on www.obdstar.com, double click , then go to the next step:
Step 1：Click “Next” to setup update tool.
Step 2: Click “Next”
Step 3: Click “Next”
Step 4: Click “Finish”
2.2 X300 pro3 Software Updating
After Update Tool installation completed, click the Update Tool software icon on desktop to start the update tools. Operation steps as following:
Step 1：Open update tool
Step 2: Click the source menu, choose the program you want to update, click it and confirm
Step 3: Click and select all the software then click “update”
Step 4: Wait for several minutes then the updating finished