This is an Inverter (LED Bulb) Auto Rechargeable Bulb has 22 LEDs and provides super bright illumination with 1200 mAh of Lithium Battery. Built-in Long-Life and maintenance free Rechargeable battery of high capacity which can give you continuous lighting back up to 4 hours. when Battery is fully charged. This Bulb is inbuilt in Auto ON Feature. The bulb should be plugged in a regular bulb holder and the switch is ON Mode. When the power cuts in your locality, The bulb Light glows Automatically. This is mainly powered by 24 Energy, so you don't worry about your electricity bills.