This is the Futaba SBS-01A Altitude Sensor for use with the 18MZ Radio System.
FEATURES:
Detects the altitude of RC aircraft from atmospheric pressure with vario meter
One year limited warranty through Hobby Services beginning at date of purchase
INCLUDES: Futaba SBS-01A Altitude Sensor with Instructions
REQUIRES: Mounting in aircraft and connecting to the S.BUS2 port of Futaba telemetry enabled receiver