About Product:Smart touch switch: the product behind the switch from off, press the first touch keys under the lights, then press the touch keys adjust the brightness. Intelligent breakpoint memory: the light will be transferred to the most comfortable brightness, it will automatically remember you this regulation, after the closure, and then open the last time when the brightness of the last light. Dual mode power supply: desk lamp can be used to light the adapter or built-in battery. (with the adapter lit lamp lights when the lamp is off) patch light source: the use of 40 imported chip LED lights, more than ordinary LED lamp 50% brightness and life.