Members normally use hand held two-way radios for our cruises and events. They are essential to ensure the cruise members can communicate with the cruise leader and others especially in case of any problem or getting lost or delayed.
We set our radios to frequency 10-10. It is also well to purchase an ear bud with the radios especially if you plan to cruise with your top down or off. Don't forget to make sure the radios are fully charged prior to the event. Also, be sure that any voice activation feature on your units is disabled so that you must "push-to'talk".
Some members use Cobra radios and other brands are good also and can be obtained at such retailers as Best Buy or other retailers.
Below is input from Mike W. (8/22/15).
Many of our members have asked me for my recommendation for purchasing 2-way
radios. I have the Midland LXT600 which works very well. It has good sound and voice transmission.
I also purchased the optional headset which I found to be very convenient. It is especially useful when driving a convertible. You can hear all voice transmission even with all the wind buffeting.