Fire alarm systems need to be inspected, tested and tagged annually. Testing must include all smoke detectors, manual pull devices, annunciators, visual indicators and strobes, control units, voice/alarm communications systems and any other devices that are a part of the fire alarm system.
it will need a port like this one to get more power from the usb since it only give 5.0 volts and this powered usb give up12 to 24 volts so you dont have that in a laptop and there is no way it could raise the power on the usb port in a laptop without damaging something .http://en.wikipedia.org/wiki/Powered_USB.
Connect the monitor, flat panel, or projector to the laptop's external video connection on the back of the computer. An example of a VGA connector for a computer monitor and VGA port on a laptop is shown to the right.Once connected, your laptop may automatically switch to the new external display, or you may be required to press a key or keys on the keyboard to switch to the external display.ome laptops can output video to both the laptop and the external display, or to a single display at a time. Laptops with this feature can toggle between the two modes when the appropriate function key is pressed.