There are 2 ways to change Xhorse VVDI BE key frequency between 315 MHZ and 433MHZ. Xhorse BE key is designed to work with VVDI MB Tool and other MB key programmers.
1: Change VVDI BE key frequency with PCB resistor
2. Change XHorse BE key frequency with VVDI MB Tool
OEM Frequency: 315MHz
In VVDI MB software, select Set key remote frequency.
Choose 433MHz and set frequency
Change frequency to 433MHz success