The translucent gray overlay on the front, bottom, and rear surfaces of the doorbell is provided to represent portions of the doorbell that are disclaimed. The underlying camera lens, the small green circle above the camera lens on the front surface, the small black circle below the camera lens, a rear section including the rear surface, the speaker holes on the bottom surface, the areas within the broken lines, the broken lines themselves, and the translucent gray overlay itself form no part of the claimed design. The remaining features, including the color thereof, form part of the claimed design.