Flymaster's F1 module is a unique combined vario/gps that, in conjunction with the NAV+, transforms your PDA into a complete flight instrument. The F1 module can be used alone, as an acoustic vario with gps data logger.
Together, they form possibly the most innovative soaring flight instrument you will find today, featuring all the necessary information either for leisure, XC, or competition flight.
To get the most from the F1, you need the NAV+ software and any PDA with transreflective screen running Windows Pocket PC 2003 Second Edition PDA, or above.