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: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Desk Lamp 1 x USB Cable 1 x User Manual