1. Power off Radar.
2. Press and hold the red knot.
3. Plug in power supply to power it on, then there will be"Loading" on Radar's screen. Release the knot.
4. Connect Radar with computer via USB cable.
5. Open the 1.2 version software, click on the "Start". It will take a few minutes.
6. Click on "Done" to finish it.
7. Then the Radar will be rebooted. After Radar booted successfully, then you could open the software on your desktop.
Notice：Please backup your presets before update, as it will clear up the presets in the unit.