This has a compact plug in design, with 3 settings- On, Off and Auto. A built in light sensor automatically turns on the device at dusk and off at dawn in the Auto mode. It has dual charger ports, either one at 2.1V or two at the same time at 1A each. Low energy use with an ambient light, cool to touch. Chargers work day or night. 6000K colour temperature (Very cool white)