if you be in the service -lrb- I be currently deploy in Iraq -rrb- , here 's why this projector be useful for you : fun : play movie and game to entertain you buddy . look great in you CHU , a dark room , or even on a t wall at night . portability : projector in case with power adaptor fit in you cargo pants pocket . Professionalism : you can set up a power point presentation without a computer . usb drive connect in the back and use the remote to advance slide . the current plan be to make a portable movie system . Vivitek state that you can use the xpal xp18000 to power the projector for 2 hour . I order that and will update this review once I try it out . I also buy the monster clarityhd bluetooth speaker for audio because the build in speaker be not good .