... Presenter (2)Page Up/Down (3)Build-in USB Flash (4)PPT Black Screen (5)USB plug-and-play 2.4GHz ... Down: support PPT, WORD, EXCEL, Internet Browser, Picture Browser, etcPPT Black Screen2.4G technology, more stable performanceUSB plug-and-play 3 ... /ctn): dimension:40*33*22cm weight:8kg 6.PRODUCT COLORstock:black, silverorder:black, silver, white, red, blue, green, yellow etc.. 7.ApplicationsTeaching ...