Works With One Person

Nobody is holding the other end on a dark shoulder, so solo use is the baseline.

Visible to Passing Cars

Being seen from a distance is the difference between a delay and a collision.

Jump Start Without Help

A dead battery at a trailhead means no passing car to run cables from.

Inflates a Tire Quickly

A slow leak on the highway needs air now, not a walk to the next exit.

Built In Light Source

Changing a wheel by phone flashlight leaves you no hand for the wrench.