This Yeelight LED Folding Desk Lamp Z1 Pro is distinguished by the high quality LEDs and the built-in 2500 mAh battery. This battery allows the lamp to stay lit for up to 40 hours without a power cord, so you can use it in all kinds of locations. The Yeelight lamp uses high-quality LEDs as its light source. It has eye-friendly light that does not flicker. The lamp uses high-quality LED light beads with no visible strobe effect and less blue light. So you can use the lamp for a long time without suffering from eye strain. The LED folding desk lamp has one button. You can press it briefly to turn the lamp on or off and you can press it long to adjust the brightness. The lamp comes with 5 brightness levels that you can set yourself.