We've used Motorola FRS radios when in caravan and are happy with them.
They go for around $50 a pair (and up). I prefer the AA dry batts (3 in each unit) and one set will last 3 days w/o turning the units off. Rechargables don't last as long and seem to be dead when we need them.
There are hands off accessories readily available (see Amazon).
The down side is they claim a huge range but in reality are line of sight. On an open highway, in a straight line, miles of range. If you go around or over a hill, no connection.
Advantage over a cell phone is it is immediate. No waiting for one to answer. Ex: you need to shout a warning, deer on the road, stalled car etc. They work in areas w/o cell service. Usually, it's more like, wow, did you see that...
Norm
