The air grew cold, then hot. The colors of the room bled together. Aris lunged for the switch, but his hand passed right through it. The matter had become probable and improbable at the same time.

The device removes the manual labor usually associated with spraying.

If you actually meant Propresser as in "ProPress" (the RIDGID plumbing tool used to connect pipes without soldering), that has interesting content too! Plumbers find it interesting because it revolutionized the industry—allowing for flame-free copper connections that can be done in seconds, saving buildings from fire hazards associated with soldering.

Interesting from a chemistry and physics standpoint, the Propresser 4T doesn't just "spray"—it atomizes the liquid.

Users can set the exact time between presses, ranging from milliseconds to hours.