1) high-quality ink, no leakage, write smoothly 2) Lighting brighter,Longer ... .Ink color:black,blue,red,etc;3.high-quality ink, no leakage, write smoothly4.High efficiency batteries,Lighting brighter,Longer use time5 ... .Blister Cards package, 50pcs/innerbox, 1000pcs/ctn7.delivery on time Light pen -817