s
The version of the Blue Jay that can program the outputs to fire e-matches before apogee, for multi-stage flights.
Note: the Blue Jay altimeters will not arrive before Christmas
The Blue Jay altimeter is the easiest rocketry altimeter to install and use. With its built-in magnetic switch, just connect a battery and your e-matches and you are ready to take your rocket to the pad. Turn the altimeter on with the included magnet and the Featherweight UI phone app connects over Bluetooth to show you everything you need to know that the rocket is ready to fly. Then when you walk up to the rocket after it lands, the phone automatically downloads and displays the flight data on your phone. The Blue Jay includes the most important features of the Blue Raven altimeter at about half the price.