Features: Product Application For SD memory card/TF memory card data transfer and writing Cell phone use For cell phones that support OTG function View card data and bi-directional transmission on cell phones,play videos on cards,etc For computer use:Universal(some are not supported) Advantages of Dual Disk Drive Inserting two SD+TF cards into the card reader at the same time can quickly identify the dual-disk drive Card reader can convert between the two drives on the computer Data conversion, reading, bi-directional transmission Connector:TYPE-C/USB(optional) Female:SD3.0 card slot+TF3.0 card slot Type:Plug and Play Specification: Name:Card Reader Color:Gray Electrical power:3.3W Salt spray test:48H Plate:Double plate Shell material:aluminum alloy 180G oxidation sandblasting Card type:U3/C10 File:3G movie SD (3.0):C10 High-speed card reading 85-95MB Write:63-65MB TF (3.0):C10 High Speed Card Read 87-90MB Write: 77-80MB Product Size:about 5.3*3*1.3cm Product weight:about 22G Support models(computer) For TYPE-C cell phones and computers,tablets,support OTG function Support models(cell phones) For TYPE-C cell phones and computers, tablets, support OTG function Support System For Windows10.8.7,VISTA,XP,MAC10.4.6 Compatible with most of the mainstream systems on the market Package includes: 1*Card reader(optional) Note: Only includes the above package products Specifications are manual test measurements,for reference only Please refer to the actual,thank you