Advance's 12 inch and 15 inch Spectrum single-motor upright vacuums deliver superior results with performance where it matters most: dirt pickup and filtration. Upright vacuums rely on a combination of dirt pickup to remove soil from carpets and filtration to ensure that dust and other airborne particles stay captured. Spectrum's innovative design has earned the CRI (Carpet & Rug Institute) Seal of Approval signifying that Spectrum meets the industry's newest dirt pickup and filtration standards for vacuum performance. These standards are more stringent than those for Green Label certification. The two-stage 1000 watt motor in Spectrum™ vacuums allows operators to pull dirt and dust from carpets in a single cleaning pass. 120V 60 Hz 1000 W 9 amp 2-stage. Airflow bypass valve and thermal overload protection.