Features: The function of the eye protection-lamp is also excellent to solve-problems such as screen reflection and-glare, and use more comfortable light to reduce eye fatigue. Solve the problem of screen reflection, etc. With a more comfortable light, reduce eye fatigue. The duct is lengthened to 26cm, and the air outlet area covers a wider-area and cools down faster than traditional desktop fans. True-personalization the wind speed is adjusted at will others are 3 or 4 gears, and we have as many gears as we want. 120° large wide angle natural blowing the air guide is 45° adjustable and does not blow in the face. Specifications: Material:ABS Size: Approx.26.6x9.12x4.7cm/10.47x3.59x1.85inch Color:Black Additional features: nightlight Motor type: brushless-motor Built-in battery: removable battery. Built-in battery capacity: 1200mA-2000mA Power supply mode: lithium-battery Wind speed gear: 6th gear. Duration: 3-6 hours Function: eye protection-lamp; Color temperature and brightness are adjustable; Infinitely regulated wind speed Package Includes: 1x Computer Fans note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.