Hoover vacuum plastic cover for the circuit board. Displays text, Carpet is clean when light turns green. Embedded Dirt Finder. Has green and red snap in lens. May also fit models U5445940, U5447900, U5449940, U5450900, U5451900, U5445-900, U5445-940, U5447-900, U5449-940, U5450-900, U5451-900. 6 1/2" wide, 1 1/4" high. 2 top snaps are 4 1/4" apart.