Logtronik Monitor lamp keeps your eyes healthy. Unique design for background balance lightComplete the ambient light behind the screen, if the light is concentrated on the screen, the dark environment will make the eyes prone to fatigue and the complement of the background light will improve the comfort of the eyes when you look at the screen. Operation instruction1.Right touch button The right touch button can control the main light, power on/off. color temperature switch /the brightness dimmer. 2. Left Touch ButtonThe left touch button can control the rear ambient light, power on/off/color temperature switch/brightness dimmer 3. Memory functionWhen the USB power is turned off, the lamp memorizes the brightness and color temperature of the last time used after powering off and restarting. Installation instructions 1.Wipe the screen 2.Attach the iron sheet with double-sided adhesive 3.Stick the bracketPackage List1 x Logtronik computer screen light1 x light holder1 x USB power cable (1 x USB power cable) 75 m. )1 x User ManualNote:Unstable voltage may cause the problem that the touch button cannot be controlled.Please turn off and then connect or connect directly to the 2A port.