You can change reading light modes easily. And there are 3 light modes for you to choose, 30%. 60%, 100% light.The desk reading light features soft and flicker-free light, which can protect your eyes from fatigue and bring you comfortable using experience.Made of high quality plastic and electronic component, this product is durable and practical.Length and width of this product is 10.9cm and 4.5cm.LED eye protection desk lamp is suitable for desk, bedroom, bedside, drawing, reading, studying, etc.Item Name: LED LampMaterial: Plastic,Electronic Component,LEDColor Temperature: 1550k, 4000kSwitching Mode: Push-buttonPower Supply: USB Power SupplyBattery Capacity: 200mAhFeatures: Low Power Consumption, Eye Caring, FlexibleSize Details: Length: 10.9cm/4.3" (Approx.) Width: 4.5cm/1.8" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x LED Lamp