This is the Sonic Igniters from the Pro Series by Estes.
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
Igniters used for the Pro Series motors
Four Sonic Igniters
Due to small parts that could cause a choking hazard please keep
away from children 3 years of age and younger
For your safety and enjoyment, always follow the NAR Model Rocketry
Safety Code while participating in any model rocketry activities