... without the fear of someone else reading them Secret Sweethearts Pen, Valentine's Day Secret Sweethearts Invisible Ink Pen with UV LightWith ... of the pen, allowing you to read any secret notes sent to you by your lover.Battery included. Features:Insivible ink and ... printing artwork and packingSuitable for Valentine's Day gift and secret messagePackage:1 pc/polybag, 1000 pcs/ctnCarton size, 51*33 ...