The ptFlex and ArduinoTrack are the all-in-one APRS tracker, specifically designed for high altitude ballooning. With built-in temperature, barometric pressure, and battery voltage monitoring capabilities, it can be ready for flight within minutes.
Bare ArduinoTrack PCB for assembling your own tracker.
ArduinoTrack assembled with the on-board HX1 transmitter.
ptFlex assembled with DRA818V transmitter.