Thank you for your detailed inquiry! We use industrial-grade photographic equipment to shoot, but there may be a slight color difference between different displays, all products have been three times the size of the calibration (error ≤ 0.5cm), the details page contains 1:1 ratio reference chart. Support 72 hours after arrival to apply for third-party material testing. Signed within 7 days if found process differences, free of evidence return and bear the cost of shipping.