Cheaper than cell phones; indispensable when outdoors. The most inexpensive mobile communications for short distances–up to two miles. If you are putting on a conference, an outdoor event, or traveling with a team, these rugged units are the things to have. They are inexpensive enough to ensure everyone on a team has one.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.