I just ordered my first high power rocket, so I don't know much about rocket electronic systems. I want to have dual recovery, an altimeter, and possibly an on-board camera in the future. I found Aerocon's FC-877 flight computer on the web, and the lcd readout it has is a nice feature. I am just confused as to what all this does by itself. Does this have a built in altimeter, or do I have to connect one to this? Does anyone have any other recommendations for flight computers?