NON-FLICKER and EYE CARE: This book lamp with non-flickering light protects eyes. There are 4 brightness levels. try their best to provide brightness and brightness. desired and protect eyes. 2 flexible arms can move as you want. Enough to illuminate an entire sheet of paper or a book. USB and AAA BATTERY OPERATION (NOT rechargeable): Power your music stand via USB (USB cable included) or 3 AAA batteries (batteries not included). included). You can use the USB cable to connect to the USB port of any devices such as laptops, power bank to power the light. Or connect the USB cable to the 5V/1A charger (not included). This lamp is NOT rechargeable.< br />MULTI-PURPOSE: Ideal for music stands, reading (for , for , tablets and regular books), piano, orchestra pits, concerts, workstations, DJs, etc. crafts, computers or as podium light, etc. is 3.6 super light and portable. Fits easily into your bag or backpack. hand, an ideal companion for traveling or camping. CLIP ON and FREE STAND: Attach it to your hand. almost all. The double silicone pad protects the gripped surface from damage. It can also stand on a desk with the base as a normal desk lamp. The double swan is adjustable 360 degrees.