Specifications: Simulated natural light, no stroboscopic, reduce eye fatigue. 2000/4000mAh large capacity battery, super energy endurance. Suitable for bedroom, living room, dining room, university dormitory, coffee table, bookcase, study, bar, restaurant, etc. Rechargeable mobile/ fan/ night lamp. Designed with pen& phone holder, convenient to watch video from smart phone. Type: Desk Lamp Material: ABS Charging Time: 3h Rated Voltage: DC5V Use Time: 8h--Strong Light, 16h--Medium Light, 48h--Low Light Rated Power: 2.5W Battery Capacity: 2000mAh, 4000mAh (Optional) USB Output: 5V/1A Color Temperature: 4200-4600k Features: 360 Degree, with Phone/Pen Holder, Touch Sensor, Eco-friendly Size: 13cm x 43cm/5.12" x 16.96" (Approx.) Notes: You will find more amazing products if you visit our store. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package Includes: 1 x Desk Lamp 1 x USB Cable 1 x User Manual