Two-wire convenience. Most modelers will like the 2-wire style of this igniter, since they are easy to hook up using standard "alligator" clips.
Tough and Durable. This igniter has a small glass bead that holds the wires together, making it nearly impossible to spread the wires too far. That, by the way, is how most igniters are damaged; when kids accidently spread them too wide apart and damage the small wire inside the pyrogen on the tip of the igniter. Not with these igniters; the glass bead holds the wires tight, making them far tougher than the standard Estes Solar Igniter.
Reliable With Low Voltage Launch Controllers. As you can see, this igniter uses a low-resistance copper wire, so that all the current is directed at the tiny bridge-wire in the tip. It heats up fast, insuring quick burst of heat to get the motor fired quickly -- even with weak batteries. It works with the Sky Launch Controller.