Product DescriptionColor: BlackBattery: Lithium-ion / 300mAhColor Temperature: Warm Light4 Brightness Levels (Button)Power: 5 WMaterial: ABS PlasticColor Rendering Index: 80Package Contents: 1 * Book Clip1. [Healthier Eyes] The book light makes reading a pleasure with the least possible strain on your eyes. The warm amber light, 99.95% blue light free, promotes melatonin production at night and reduces eye fatigue. 4 brightness levels. Click the switch to choose the most comfortable brightness that best protects your eyes.2. [Read at Night Without Disturbing Your Partner] This book light is super lightweight. Simply clip it to your book and create a private reading space for yourself when your partner is sleeping next to you. Ideal for reading in bed at night.3. [USB Rechargeable] Built-in 300mAh polymer lithium battery, no extra cable required, it can be used with phone charger, power bank, laptop, car USB device or any standard USB charger.4. [Lightweight, Portable & Flexible] Compact design with flexible and bendable body makes it flexible to bend 360 . The ultra-flexible body adapts every angle to your different reading positions. Use removable clips to hold it in a book, reader, clipboard, visor, etc. You can easily take this compact book light with you anywhere.