Today's radios have tons of options, like interference elimination, weather alerts, and so forth. None are crucial. An emergency button, which transmits an SOS signal and permits hands-free communication, is a good safety feature. Make sure to buy a set that operates on GMRS bands (1 to 5 watt), as well as the less powerful FRS bands (1⁄2 watt). To use the more potent channels, you're required to buy a five-year license ($75) through the FCC, an unenforceable regulation and one I'll bet no more than one in 100 radioheads obeys. Still, what would your mother tell you to do?