The Widmer O-3 is for use where the message remains constant. For the validation of documents, special instructions, specific orders, shipping instructions, ect. It can also be used as a check signer or check endorser. The factory would charge an extra for an extension trigger to endorse checks, but I'm able to adjust it to work at no extra cost! It is a good low cost alternative to the Widmer S-3, it just doesn't have all the bells and whistles. Engraving area of 2"x 1 7/8". Will come with keys, manual, black or purple ink ribbon, and FREE ETCHING PLATE. 90 day mechanical warranty.