This is a device to wear on one of your arms. Can be purchased from most 'reputable' traders.
A favorite item of bored
Gods and Goddesses with too much time on their hands, who are looking for new and creative ways of <s>irritating</s> enjoying their heroes.
Contains many things which are highly valued by heroes (except a built-in supply of beer), like a health monitor to see if they are dead, a full list of inventory items including broken artifacts and space taken up by tribbles, a list of the equipment and weapons currently being used, and maps to guide them to the nearest <s>tavern</s> town, and lots of pretty buttons and sliding things that are fun to play with, but beyond the mental abilities of the average hero.