Lingstar E27 Lamp Holder LED Emergency Light Household power Rechargeable intelligent light (with a Switch) 9W Led emergency E27 bulb light,can work under water,can work with hand touching,can work after power failure The bulb will automatically work as power failure When the bulb is power off,touch it like the picture as Conduction is the cathode, it will be like charging and get bright,so amazing It can work for more than 2 hours after power outage. Color:White