3 Color Modes & 5 Brightness Levels: The clip-on reading lamp offers 3 color temperatures and 5 brightness levels (1600K warm light, 4200K warm white light, 6000K cool white light), protect your eyes and protect you allows you to easily adapt to different lighting situations. and create a private reading space for you. Scheduled shut-off: The reading light for bed has a timer function. Press and hold the power button for 2 seconds to set the playing time for 30 minutes (green light appears), long press again for 2 seconds, set a reading. duration of 60 minutes (the blue indicator lights up). Avoid wasting electricity because the book light is on all night. USB charging: The night book reading light has a built-in 500 mAh lithium battery, and the interface charging port is a standard USB charging port, which can be easily connected to computer, PC, mobile power, etc. It takes 2.5-3 hours for a full charge and it can provide up to 8-80 hours of reading time, which means if you read 30 minutes a day, it can provide you with up to 3 months of lighting time. Flexible angle design: This reading lamp for reading in bed can adjust the reading angle according to the eyes, the lamp head can be turned down to 45, rotated horizontally 90 left and right, adjust the angle more comfortably, light weight, only 1.57 oz (45 grams). Practical and versatile: this bed clamp lamp is small in size and light in weight, easy to carry anytime anywhere, the book clip reading light can not only be used as a book light, but also as a bookmark, very suitable for giving as a gift .