Doppler Sensing Technology: Smart Power Saving features provides controlled energy dissipation * Built-in: Auto "dimming down" after delay period as initial energy smart saving; then follow with "Auto shut off" after 4hrs no movement detected as smart saving * Hybrid functionality with AC power source and Lithium back-up battery * Power outage automatic override feature providing Emergency illumination backup when power outage (AC Loss) occurs, as simple as remain standard illumination operation. (Refer EESGI YouTube: "http://youtu.be/V_Ftm2HDzrY" and "http://www.eledingsolar.com/ProductImages/GreenEnergy/LowPower/EE809WMC/Laundry Room Application.gif") * Stylish lighting fixture design, easily setup, ceiling or wall mountable, can be DIY. Designed, Developed, Engineered and QC"d in USA