Jim Lee: “It looks pretty good, weighs practically nothing, and disassembles easily. This paint roller handle is actually adjustable. Just a twist of the handle and it extends up to 19 inches. The umbrella itself opens to about 19 inches in diameter. It is necessary to remove the headband and punch a hole in the very top for the handle. Otherwise, no modificatins to the umbrella are needed. As for the handle, remove the plastic roller holders, file off the little burrs that hold them on, and you are in business.”
My opinion : you can use it as fun project and discover some electronics, or you can use it as a spy-project which i don’t encourage because it could get you in trouble. Be careful how you use it, good luck building it!
here is the Link to authors page