... or speech, keyboard, mouse, laser pointer in one hand and hand, three-dimensional explanation, a more lively! The instructor must have thebest weapon ... Teaching, training, lectures: keyboard, mouse, laser pointer in one hand and hand, three-dimensional explanation, amore lively!IPTV, Living Room Computers: ... Keyboard & Touchapd & Laser Pointer 3 in 1 10 Meters Operate From A long Distance,Convenient