... 4,Good promotional item projection led pen, promotion pen, image projector pen, promotional led pen , metal & plastic ball pen1 ... ,projector pen is good promotion gift2,Logo image projection,logo print available3,Smooth writing,high ... 8.6KGSSpecificationsize:12.7*148mm weight: 19g batteries:AG3*4PCS, projector of parameters: initial focal length ≥50MM ,As more than ...