Perfect Reading Light for Reading in Bed: Clip-on reading light allows you to adjust the light intensity by pressing the button on the back for a long time (about 3-5 seconds) to read at night without disturbing your partner who could sleep next to you 3 Color Temperature: book reading light gives you 3 color temperature (Yellow, White, Mixed) for you to choose by pressing the button on the back, which adapts to all circumstances for a pleasant reading Light and Practical Clip: led reading lamp has a light and practical clip and the clip easily attaches to the book and allows you to turn the pages without getting in the way and without leaving a mark, also does not damage the books. The size of the clip opening is 3cm allowing it to take 120 pages at most Easily Charge: The reading lamp tab has 2 small gray connectors on the bottom of the tab the USB socket that which allows it to be plugged into a USB mains socket, No need for an additional cable. Only takes 30-40 minutes to be fully charged, and you can use it for up to 3 hours