The jetStamp 790, 791, and 792 models are digital marking machines that are capable of easily and quickly printing on uneven surfaces, forms and bundles of documents such as envelopes. They are generated with a battery and are versatile machines that can be operated in any place. Specially designed for marking products, these compact digital marking machines can produce number, date, time and text all in a single or double line impression. The character's width can be adjusted and a maximum of 20 characters can be produced in one line. This machine is installed with an LCD display.