Very high quality plastic-based LED energy saving bulb. Works with any USB port. Not easily breakable. Low energy consumption, high brightness, stable performance, made of high quality materials. Designed with USB interface. Power supply comes from the USB source which could be your laptop, power bank, etc. Comes in handy in an isolated environment where there is no electricity such as picnics, camping, crusades or even in the event of power outages. Shines as bright as an electric bulb.?Environmentally friendly: natural and healthy energyHandy emergency lightUseful as a dinner lightA good reading lamp for studentsPure whiteEnergy saving1000hrs Long LifeWattage: 0-5WPower Consumption: about 4KwhLightweight: about 58gUSB Cable Length: approximately 106cmMight repel mosquitoesAvailble in different colors?Very high quality plastic-based LED energy saving bulb. Works with any USB port. Not easily breakable. Low energy consumption, high brightness, stable performance, made of high quality materials. Designed with USB interface. Power supply comes from the USB source which could be your laptop, power bank, etc. Comes in handy in an isolated environment where there is no electricity such as picnics, camping, crusades or even in the event of power outages. Shines as bright as an electric bulb.?Environmentally friendly: natural and healthy energyHandy emergency lightUseful as a dinner lightA good reading lamp for studentsPure whiteEnergy saving1000hrs Long LifeWattage: 0-5WPower Consumption: about 4KwhLightweight: about 58gUSB Cable Length: approximately 106cmAvailable in different colors