Firstly: This pen have 2 functions, the first paragraph is LED flash function,this pliable tube can easely bend folding, the second paragraph is projector function,can project a wide range of LOGO, to do with Super bright LED source project, so that projection LOGO out more perfect, more clearly. Projection distance of 0.3M-0.6M is most clear,the distance can reach more than 1M in a dark projection. Secondly; there are two pen refill inside,and can use conversion, it is convenient to select one out of a pen refill; pen refill color have red, blue, black, PDA, etc.!
batteries: 4*AG3
size: 14.5cm(length) x 1.3cm(dia.)