4 High Quality LEDs - Each arm has 2 LEDs, four adjustable levels, excellent eye protection design book lamp provides bright, soft and flicker-free light for your reading, meeting and outdoor sports or barbecue. Power supply AAA batteries not included. Flexible Tool - Flexible and strong, the angle can be adjusted arbitrarily. The arm is covered with high quality soft silicone, non-toxic, safe to use and comfortable to wear. Easy to Carry - Wearing on the neck can free your hands, very convenient and practical. The LED book light does not require a lot of space and can be easily put in the suitcase. In all respects, this is an ideal choice. Perfect Design - Light can be precisely positioned and focused on desired position. The ergonomic neck design is ultra-light and completely hands-free. The contact part of the neck is equipped with a soft cushion. Very pleasant to touch and wear.