Portable & Compact & Lightweight Reading Light for Reading in Bed: The size of the book light is a quarter of a smartphone and the weight is only 31 grams. Easy to carry and store in your handbag. Very practical and light even for reading paperbacks at night 3 Color Temperature at Your Choice Book reading lamp gives you 3 color temperature (Yellow, White, Mixed) at your choice by pressing on the operation button, which adapts to all circumstances for a pleasant reading Adjustable Brightness Intensity (from Low Brightness to High Brightness): clip-on reading lamp allows you to adjust the intensity luminous by pressing the operation button for a long time (about 3-5 seconds) to read at night without disturbing your partner; Several brightnesses so as not to hurt your eyes Easily Charge: Equipped with a USB cable, you have several charging choices (Charge on a mains socket, on a computer connector, on an external battery connector, etc.). Only take 1-1.5 hours to fully charge the lamp and you can use it for up to 3 -24 hours Multiple Applications: The lamp clamps well on the book page and the collar, and it does not damage the books. The flexible lamp holds the chosen position and you can enjoy a comfortable lighting angle. You can use it as a bedside lamp, as a temporary night light, but also as a precision lamp for DIY, to illuminate the keyboard of a computer, and of course to read in bed at night, even serves as a lamp of pocket if need Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference , depending on the physical object received.