Suitable for traditional blackboard, electric whiteboard, it will not damage the screen. Ample space for teachers, lectures, speeches, commanders, members of explanations and so on, effectively signaling key information at the time of presentation or teaching. But please note that this pointer doesn't support the writing enter. No powerful laser pointer, presentation clicker, high power, laser pointer pen, green. Comfortable non-slip frosted handle, sturdy when fully opened, not shaky. Material: Stainless steel. Contraction length: 170mm/ 6.69''. Extention length: approx. 550mm/ 21.65''. 5 section extendable pointer, Durable, portable, extendable, retractable. The head adopts a finger shape, teaching pointer 100% brand new and high quality.