Hello!

There is an obvious difference between the two;

"TM" is a trademark symbol. In China, the TM on the trademark also has its own special meaning. In fact, the TM mark does not protect the trademark. Function, it is different from R. TM means that the trademark has been applied to the National Trademark Office, and the National Trademark Office has also issued a "Notice of Acceptance" and entered the opposition period, which can prevent others from filing repeated applications. , also means that existing trademark holders have priority right to use. The circle R indicates "registered trademark", which means that the trademark has been applied for registration at the National Trademark Office and has been reviewed and approved by the Trademark Office to become a registered trademark. The R in the circle is the first letter of English register. Registered trademarks have the characteristics of exclusivity, exclusivity, and uniqueness. They are exclusively owned by the owner of the registered trademark and are protected by law. No enterprise or individual may use it without the permission or authorization of the owner of the registered trademark, otherwise they will bear infringement liability. TM means the trademark symbol, that is, the words, graphics or symbols marked with TM are trademarks, but they are not necessarily registered (unregistered ones are not protected by law). TM is the abbreviation of English trademark.

A standard for "TF" memory cards. TF is a small card and SD is a large card. They are both types of flash memory cards. TF card is the smallest in size and can be used as an SD card through an SD card converter. The adapter can be used on devices that use SD as storage media. TransFlash was primarily developed for camera phones to capture large images and download larger video clips. TransFlash cards can be used to store personal data, such as digital photos, MP3s, games, applications for mobile phones, and personal data. It also has a copyright protection management system to protect downloaded music, images, and games; new models will be launched in the future. TransFlash is also equipped with encryption capabilities to protect personal data, financial records and health and medical documents. The small size of TransFlash allows manufacturers to adopt this design without worrying about the size of the phone. Another flexible application is that it allows suppliers to make replacements at any time according to different customer needs before delivery. This advantage is not available in embedded flash memory. .

I hope it will be helpful to you and hope you will adopt it! !