Yup, Got a couple of them. Apogee only barometric deployment altimeter. I believe it had a 5000' ASL limit unless the chip was modified by the
maker. I think perhaps Mike Dorffler did some work on this even though Transolve sold most of them. Don't hold me to it but I stumbled onto a website
that suggested that besides his design on a straight up Estes altimeter. Oh, low current ematch and they said to use the 12V battery one time only. Kurt