Regular walkie talkie use from the hearing perspective:
Hubby and I have walkie talkies. We use them:
* after church services when he's locking up buildings all over the campus so I don't need to search for him.
* shopping, if we want to split up at the store but keep in touch.
* camping, especially with kids; one for the kids, one for us.
* traveling in a "convoy", such as hurricane evacuation. We found out the hard way that you can't always get a cell phone signal when traveling. When we were driving separate cars, we couldn't let each other know if we got lost, or needed to stop for some reason. Our family was in four vehicles, and we wanted to stay together. Now we have four walkie talkies, if we need to do that again.
Walkie talkies have various ranges. You need to check what the stated range is for each model. Then, you should test it at home to see if it is accurate. We found that the actual range is usually less than the stated range. Ours work for at least two miles, maybe three depending on conditions.
You don't need a service plan for regular walkie talkies.
You can use them indoors, outdoors, thru normal (unshielded) walls, etc., no problem.
I couldn't see on the picture of the text "walkie talkie" but you need to have a way to easily switch channels like a regular walkie talkie because the airwaves are open to everyone.
You should get rechargables because they eat up batteries.