Seems ok for somebody without mechanical skills.

I do always recommend a short instruction tag for things people rarely use.

Food, water and maybe something extra warm are always nice.

I have LED flares too, but changed my opinion about them over the years. Sticking them on a vehicle if your hazards don’t work, no problems. Putting a few on the ground towards the traffic, with traffic moving. I’ll just stand behind the guardrail. Seen too many crash absorbers with giant warning lights and flashing arrows getting hit.

If you are near the mountains; proper winter tires, snow chains (automatic tensioning models are highly recommended), towstrap, small shovel, mini traction plates.