[5 adjustable brightness levels] This reading lamp has 5 brightness levels, choose the most suitable brightness level according to your needs. Thanks to its 5 high-quality, professionally installed LEDs, you can evenly distribute the light on your reading pages; At the same time, there will be no flashing or annoying lights. In addition, Little lightbook Reading can remember its previous brightness settings as default settings. [3 color modes and vision protection] the little light for reading books on the bed has 3 temperatures of color: amber (1800k), normal playback mode (3400k) and focus (6000k). Amber mode filters 99.9% of blue light to protect and prevent eye fatigue; The general way of reading a reading bed creates a relaxed and comfortable reading environment for reading a novel or poem; Focus mode clearly highlights these areas so you can concentrate on your tasks. [rechargeable via USB and long life] rechargeable and compatible with any type of USB or standard port. This LED reading light has a built-in 500 Mah battery that lasts 10 to 80 hours (depending on lamp configuration). This means that if you read 30 minutes a day (also in your setup), you can enjoy at least 20 days to 3 months of reading. Besides, there are 4 Energy Indicators which can show the remaining energy. Lamp for reading in the perfect bed. [Flexible and lightweight design] the clip of this reading lamp can be opened 150°. The head can be turned left, right and down with respective angles of 90°, 90° and 45°; This allows you to freely adjust the angle to achieve suitable lighting. Additionally, it is 1.41 ounces (40 grams) lighter than eggs. Its lightweight, compact design makes it easy to carry or hang on a paperback book. The lamp for reading a book in bed at night is small and ideal.