Have your credit or switch card ready when you phone and as precise a description as possible of what you would like to order. Items out of stock will normally be available within about a week.
Upgrades take about a week, and just cost the difference in price.
Pressure recording for previous 48 hours, to give play back of pressure, time, date and trends. As the Comp, plus GPS access for final glide computer, to give actual glide, required glide to waypoint and safety height. Ideal back up, or as a zero feature alternative for minimalists. Truly versitile and robust. Full feature GPS with NMEA output for connection to GPS access instruments.