Electronic Computer Bible and Concordance (pocket edition).
This is an extraordinary tool.
Look up any word in the KJV and it takes you to each of them, in their context. Much easier than looking them up in a hardback concordance and then trying to find each of the citations in the Bible.
Easier than a bulky computer. It is the size of a wallet and fits in pocket or purse.
Great for witnessing; it allows you to quickly look up any word to find answers to inquirers questions.