This is the Interlock Launch Controller for Model Rockets by Aerotech, which can be used with all model and advanced model rockets.
The product features:
An audible arming signal.
Key-Eject safety key ejection system.
12 metres (40') feet of heavy duty power cord to your launch pad.
Manual arming status indication (red/green).
Flip-up cover with launch checklist. The cover guards the controller launch button.
Igniter alligator clips for use with all igniter types (note: image depicts the interlock clip, however product comes with alligator clips) .
Heavy Duty battery clips and cable.
Durable black polymer case.
High visibility graphics. The unit produces a warning alarm when the launch controller is armed, and the spring-loaded safety key system is designed to ensure the controller is never left in an 'armed' position.
Required: external battery - 12v car, motorcycle, sealed unit. Refer: