Looking from the back of the V10 Plus, the left side has the min-jack for composite video and sound, as well as a covered area (rubber) that hides the SD card slot. The opposite side (the right, when looking from the back, has the infra-red sensor for the remote control, the other speaker, and at the very front, the focus dial. The back of the Aiptek projector has only the USB connector, which (as with the Optoma Pico) is used only for plugging in the power supply to recharge the battery, or run the projector off of AC. There is also a Kensington lock cut out, in the back right corner. I guess you can use that to put the V10 Plus on a keychain. Afterall, considering that the Aiptek is an extremely portable projector, it's hard to imagine applications where you would leave it on display, and need to use a security lock, when it can so easily be stuffed into a pocket, or locked drawer. There is no fan, but there are vents at the bottom, as well as the perfed area at the top, to allow air to circulate. Also on the bottom is a recessed, threaded hole for connecting the Aiptek V10 Plus to any tripod, that uses the standard tripod threading. Like the 3M MPro 110, the Aiptek V10 Plus cannot recharge the battery, while the projector is on. If the projector is plugged in, to charge the battery, you must turn the projector off.