Ultra-light handle weight allows for strain-free operation. Flat to floor feature allows the vacuum easily to clean under beds and furniture. No-tool brush removal for easy maintenance. Detail cleaning tools conveniently located on the back of the machine. The Sensor S comes standard with a high-efficiency filter that traps up 99.6% of particles at 0.3 microns. Optional HEPA filtration is available. Meets CRI standards for indoor air quality. Equipped with indicator lights that light up if the vacuum bag is full, the brush height needs to be adjusted, or if there is a brush jam. If these precautionary lights are ignored, the machine will automatically shut down, protecting your employees and your machine from potential harm. Quiet operation at only 69 dBA.