About Product:Light shade: using 46 imported LED lamp, 50% improved brightness and lifetime than ordinary LED lamp. Stepless dimming: through the rotary knob switch to adjust the intensity of the LED light brightness state, free adjustment. Dual mode power supply: "220V power" files, the use of direct power supply; "battery powered" file, using the built-in battery power supply. Ultra large capacity battery: built-in 1800mAh large capacity battery, full of electricity can be used continuously for about 4 hours.