The Apogee SimpleTimer for Staging has been designed for timing applications in high-power consumer rocketry. Its intended use is to start igniter in the sustainer motor of a two stage rocket. It allows you to perform spectacular flights that excite any crowd at the launch range. To assure launch safety, its built-in logic prevents ignition of the upper stage if the rocket goes unstable or is tilted more than 45° from vertical at the time of ignition of the upper stage. This prevents the upper stage from flying on an unsafe trajectory. It is perfect for high-power rockets! This video gives an introduction to the SimpleTimer for staging model rockets, and walks you through setting it up for your two-stage rocketry project. More information at: https://www.apogeerockets.com/Electronics-Payloads/Staging/SimpleTimer-for-Staging-1-pk The rocket kit in this video is the Cosmodrome Aerobee-Hi. It has been discontinued and is no longer available. Sorry...