Yes it's px3
Should work fine for your unit.
Mine is a PX3 Pumpkin radio running Android 7.1.2
It flashed in via USB stick no problem. First boot after update took a long time so don't worry if yours does the same....
Update went great however it wont let me copy the mtce-utils folder to the root drive of the SD. I was using ES file explorer. Do I need to use a different file explorer?