Field Link Portable Programmer allows you to modify the most commonly used settings in your Castle controller at the touch of a single button.
 
Field Link for Flying settings:
- Cutoff voltage
- Auto LiPo volts per cell (3.0, 3.1, 3.2, 3.3, 3.4, 3.5)
- Low voltage cutoff type
- BEC voltage setting*
- Motor timing*
- Motor direction
- Throttle type*
- Brake 
- Governor gain*
 
*If applicable to your ESC. Please check "Specifications" section for full list of functions.