The RSL216 Emergency Sensor Light automatically lights up in a power failure and lasts up to 2 hours. The RSL216 has an infrared motion sensor light that illuminates as you walk by in dark areas, ideal for illuminating hallways, bedrooms and stair cases. The RSL216 can also be used as a mobile torch whereby the 2 LED痴 will last up to 90 minutes. There is a side switch for selection of operating mode. This unit is designed for indoor use only, and is recharged by an induction charger.