Eco-friendly, EPEAT Gold certified Philips Business Line 221B3 LED display with intelligent PowerSensor detects user presence and adjusts power consumption saving up to 80% of energy bills! PowerSensor is a built-in 'people sensor' that transmits and receives harmless infrared signals to determine if user is present and automatically reduces monitor brightness when user steps away from the desk, cutting energy costs by up to 80-percent and prolonging monitor life. Philips' monitor with LED backlighting is free of mercury content, one of the most toxic natural substances which affect humans and animals. This allows for an eco-friendly display throughout its lifecycle, from manufacturing to disposal.