Deli laser page turning pen charging ppt remote control pen projector teaching speech projection sand table demonstration teacher with slide multimedia page turning pen computer infrared pen electronic teaching whip

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Color classification:: 2801 white red light 100 meters (inner protection bag) 2801 black red light 100 meters (inner protection bag) 2801G white green light 100 meters (inner protection bag) 2801G black green light 100 meters (inner protection bag) 2802 white 30 meters (inner protection bag) 2802 black 30 meters (inner protection bag) 2802P white 100 meters (inner protection bag) 2802P black 100 meters (internal protection bag) 2808 white 30 meters (internal protection bag) 2808 black 30 meters (inner protective bag) 2808 blue 30 meters (inner protective bag) 2808P white 100 meters (inner protective bag) 2808P black 100 meters (inner protective bag) 2808P blue 100 meters (inner protective bag) 2803 30 meters flying squirrel 2805 100 meters long distance flying squirrel 2806 100 meters long distance flying squirrel + with its own U disk + one-click annotation 50601 30 meters touch design