feature C10 high-speed version: write speed 10MB/s, read speed 20MB/s The C10 high-speed version has a write speed of more than 10MB per second. It is generally used for reading on the device after saving files. It does not frequently write and delete files on the memory card. On this type of device that only uses reading Using it, the stability is good, which can save a lot of cost, and the quality is better than the C6 normal speed version. Reminder: If it is used for video equipment, it is easy to burn the card, please choose carefully. Compatible with: children's camera, card speaker, car audio, smart watch, video player, game console, navigator, learning machine, elderly machine, functional machine, recording pen, player C10 fixed version U3: write speed 25MB/s read speed 90MB/sThe U3 model of the C10 fixed version is currently the better version on the market. It is superior to the C10 high-speed version in terms of speed, compatibility and stability. It fully supports various devices and can be repeatedly rewritten. Recommended for video equipment Compatible with: driving recorder, surveillance camera, sports camera, children's camera, plug-in speaker, video player, game console, navigator, learning machine TF card (small card), different from SD card (big card), TF card is about 1/4 of SD card, is currently in circulation, small memory card, suitable for mobile phones, driving recorders, car navigation, plug-in cards Audio, learning machines, cameras, surveillance cameras and other equipment. The TF card has the advantages of the traditional SD card, and it can be converted into an SD card with an SD adapter card holder, and is compatible with the device using the SD card, and meets the SD specification standard. Regarding the speed the speed in our detailed picture is the highest speed of the memory card, and please use a USB3.0 card reader to plug in the 3.0USB interface of the computer to test, otherwise the speed will be lower Package : 1 X memory card Product grade standard: C10=Class10=write more than 10M per second; U3=write more than 22-30M per second; The mark on this product indicates the installed memory capacity, not the actual storage capacity that can be used. *The storage capacity of 1MB is calculated as 1,048,576 bytes. Part of the storage capacity is used as the management area, so the usable storage capacity is as described above. TF card size: 15mm(L)11mm(W)1mm(T) Interface type: TF memory card standard specification (8pin) Working voltage: 2.7 ~ 3.3V Working temperature: -2585 Storage temperature: -2065 Storage humidity: 30~80%RH (no condensation)