Aluminum alloy + PC plastic product description: double card double read two CARDS can be displayed at the same time in the mobile phone/computer, and copy the files each other, mobile phones, computers and bring start interface with TYPE - C2.0 interface, support common SD/TF card on the market can be read at the same time support each other copy, compatible with a variety of devices, memory CARDS, 512 g large capacity memory card support, system support: SD.SDHC, SDXC, Micro SD, Micro SDHC, Micro SDXC specification flash card, support TYPE C mobile phone.Tablet PC, laptop, etc., work temperature: - 20 ° to + 60 °, storage temperature: - 20 ° to + 70 °, humidity: 20% RH to 85% RH, interface;TYPE C interface +Micro SD (TF) card +SD card interface +USB