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.

Radiometrix

HX1 Transmitter Module w/SMA

Radiometrix HX1 transmitter module on 144.39MHz.

Variant price modifier:
Sales price with discount:
$59.95
Discount:

HX1 145.175MHz Transmitter Module w/SMA

Radiometrix HX1 transmitter module on 144.39MHz.

$69.95
Variant price modifier:
Sales price with discount:
$52.46
Discount: $17.49