E-joy Dimmable LED Desk Lamp Portable Solar Powered Lights Foldable Clip lamp Rechargeable Reading Lamps, Bedroom Lamps Clamp Lights Firstly switch the side general switch to "" that means "on", then touch the main middle switch to turn on or turn off the light. Stepless Adjustable Brightness: The LED brightness is adjustable by touch and retains the last brightness setting-even after you turn it off. 22 individual LED bulbs offer a temperature that is perfectly suited to protect eyes, natural, non-flickering, stress-free productivity and enjoyment. Desk lamp and clip lamp 2 in 1: With removable bottom clip ,It can stand on desk with its own base just like common lamps or can clip almost anywhere and any angle with its anti-skid clip. Wireless and portable -Solar / USB Powered- It can be powered via USB with built-in rechargeable battery, or you can charge it just under the sunlight.