Pro-face Remote HMI Free software allows operators to check status of HMI screens on multiple applications remotely, and assist HMI operation as a sub-display of HMI unit connected with Smartphone and Tablet. Quick 3 steps to use Pro-face Remote HMI Free. 1. Prepare Wireless Router and connect to GP4000. 2. Adjust GP application in GP-Pro EX and transfer it to GP4000.