Data writing speed: 3mb-7mb / S (USB2.0) Working temperature: 10 ℃ - 40 ℃ Working humidity: 10% - 90% Storage temperature: - 20 ℃ - 60 ℃ Storage humidity: 5% - 95% Features: silk screen printing, color printing and laser customer advertising and logo trademarks. Product uses: personalized mobile storage, good gifts, company exhibition gifts,