3 Colors & Adjustable Brightness: Features three modes: warm light, warm white light, and white light, with brightness that can be gradually adjusted from 100% to 10% as needed. Rechargeable & Eco-Friendly: Built-in 1800 mAh battery. When fully charged, 100% brightness can be used for 8-80 hours. With a charging interface, it saves the cost of buying batteries and reduces waste battery production, making it more environmentally friendly. Comfortable & Adjustable Arm: The ergonomic neck rest can be adjusted to any angle to secure it to your neck, preventing it from moving freely and keeping your neck comfortable. It can also be set up as a desk lamp. Its versatile design allows it to be used on a desk. It's also ideal for reading, knitting, camping, crafting, and can be completely hands-free while you're doing something. Eye-Caring & Won't Disturb Others: Children and adults no longer experience eye fatigue. It's bright enough for the area you've placed it in and won't disturb your sleeping partner. Adjusting the brightness can reduce the light area without affecting your reading or your sleeping partner. It can be given as a gift to your little friends or children, so they can have a unique LED neck reading light.