Festures: Materials :Sofe PU The best view angle -- is refers to the people in the office ,read a book ,work to keep the eyes comfortable veiwing angle . To the human eyes to look straight ahead is 90 degree as the standard downward sloping 15-40 is the best view angle . This perspective can extend greatly eyes using time and not feel fatigue ,and can provide the reading effciency . Lifetime Warranty 1.30 Days Money Back Guarantee. 2.Lifetime Warranty after your purchase. 3.Any quality problem for product or unhappy shopping experiences, please do not hesitated to contact us, we will try our best to satisfy with you. Your great support and interested are our biggest motivation for innovation & improve our service.
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