Handheld Ink�Jet Printer�Reiner speedJet 798 can print on any absorbent surface smooth or irregular. The latest�portable inkjet printer�technology is now available -�Handheld Ink‐Jet Printer�pen. Automatic numbering machine�works using inkjet technology but operates like a pen, allowing a user to write on a surface with consecutive serial numbers, time-stamps, date-codes or just plain text. Batch, date & number�Portable Inkjet Pen�is capable of printing�dates, times and serial numbers, automatically updating these codes after every consecutive print.