Telescopic Special Pointer for Teachers Teaching Stick for Blackboard Class Baton Whiteboard Touch Screen Pen and Stick Guide
https://www.vogueparade.com/shopping/EN/100003135/1/1005003355045471/telescopic-special-pointer-for-teachers-teaching-stick-for-blackboard-class-baton-whiteboard-touch-screen-pen-and-stick-guide//