[3 Colors & Adjustable Brightness] Each head features an independent switch. Short press to adjust the color temperature (cool white, warm white). Long press to adjust the brightness (1%-100%). To prevent accidental touches, please press the power button before use. [2000mAh Rechargeable Battery] This neck reading light lasts for 11 to 60 hours, providing up to 2 weeks of use. It only takes 5 hours to charge with a 5V-2A adapter. No need to waste money on AAA batteries! [Unlimited Flexible Arms] Say goodbye to holding a flashlight or wearing a headlamp! This allows you to precisely position and focus the light. Covered with high-quality soft rubber, it can be bent into any shape you need. [Eye Care & Indicator Light] No flicker, blue light filter design, and advanced LED beads. Both children and adults can say goodbye to eye strain. The charging indicator and power reminder ensure you charge in time when the battery is low. [Ergonomic Design] Conforms to the body and relieves pressure on the shoulders and neck. When reading or busy knitting, crafting, or crocheting, free your hands and focus on what you're doing without worrying about lighting.