50 PCS NFC Tags Sticker with NTAG213 Chip Blank NFC Stickers Adhesive Labels RFID Tags Rewritable 137 Bytes Memory Compatible with All NFC-Enabled Smartphones and Devices

These do work with Ubiquiti/Unifi/Access readers (if you turn on "3rd party" cards option), although they are very low security (since any phone with NFC can read/impersonate them). But they are great if you don't need that level of security.They *are* pre-programmed with a 10-digit number on each tag (although it is not printed anywhere; you can use a USB HID reader and obtain the number if needed, or read it from a phone app). And it appears to be somewhat random (not sequential). The first 4 tags were numbered 2458982148, 2458981124, 2459045892, 2459048964. I can't spot the pattern, if there is one, other than the numbers are increasing. I don't know if different batches would have tags with the same number, but it is possible. It might even happen in the same batch (which could be problematic). Of course, you can reprogram the number to something else, but that is an additional hassle and wouldn't help with knowing if that number was already used. I do wish they enclosed documentation with the exact numbering methodology/scheme; it wouldn't cost them hardly anything to do (1 piece of paper).Anyway, I tested sticking these to the back surface of ID badges, and so far they seem to hold up well (if you clean the surface first). None of the several I have been using with people for several weeks have failed in any way. They are reasonably sticky and constructed well and easy to remove from the backing. Then I tested actually laminating these INSIDE newly-made ID badges. To my surprise, the heat/pressure didn't damage them and they work fine! Also didn't seem to affect the range. With the Unifi readers, that seems to be about under 1 inch or so, which is reasonable for such a small tag.Overall, I am very happy. Except for not knowing how they are numbered, they are nearly perfect for what I wanted to do and will likely buy many more.

Los uso para mi negocio y a pesar de que son un poco difíciles de usar sirven

Mirror what the other reviewers say, with my own two cents. It's really easy to use with any NFC app you find on the app store. I have an iPhone so I usually use NFC Tools, but I bounce between a couple just to make sure that the commands are working. The sticking quality is really good. For speed, that depends on your data/connection so that's user error. And for functionality, just make sure that your device can do NFC things like the "Tap-to" function.My complaints are that the package it arrives in is SO suspicious. It's an envelope with a line of these- clearly ripped from a roll. I wish it came as a washitape roll instead of a creepy piece of torn paper. It makes you nervous to tap your device, but at least it functions well.In addition, make sure to allocate one or two test tags, as sometimes the commands won't erase fully- and there's nothing you can do about it. Learnt this the hard way.

These worked perfect for making custom rfid 3d printed room keys for our airbnbs .

I use an iPhone as a primary phone. This product would be great had it been clearly mentioned that it will only work with shortcuts for things which is a huge nerf to the optimization. I had placed one in my living room and wanted to set it up to auto connect friends and family to the WiFi, but shortcuts doesn’t allow that… so now I have a sticker on the wall that does nothing essentially. It’s not all useless because if I am driving I can have a tag that will automatically get directions home but besides that it’s a very mediocre product due to the limitations on iPhone. It is a great product for the price and it sticks on really well. The way it looks is a bit futuristic but sticks out on a single color wall, but I will say that the best thing about this item is how small it is. The typical NFC pucks are too big for what I want it for so this as of right now is the best way of having something so condensed for automation. Love the product but please warn me ahead of time that it’s limited on use for iPhones.

These work great! I use them for nails and was worried they wouldn’t hold up under the product but it didn’t disappoint! Held up extremely well. I was also worried I wouldn’t figure out how to program them but it’s so easy to use. I downloaded an app called like NFC tools (it’s orange) and it’s pretty much self explanatory from there but I recommend TikTok for more help. The size of these are good for putting under nails but they will be difficult to work with for shorties. I cute the little sticky excess off and just use nail glue to glue down the metal wiring party. Overall amazing quality and good signal for the price and size of these!

The LeadSeals 30 PCS NFC Tags Stickers with NTAG213 chips have been a fantastic addition to my tech toolkit.Functionality: These tags are rewritable and programmable, allowing for repeated edits or setting them to read-only mode for added security.UBUYCompatibility: They work seamlessly with all NFC-enabled smartphones and devices, making them highly versatile for various applications.WALMARTDesign: The adhesive backing is strong, ensuring they stay in place once applied. The white finish blends well with different surfaces, maintaining a clean look.Durability: Made from environmentally friendly PET material, these tags are waterproof, smooth, and wear-resistant, ensuring longevity even in various conditions.AMAZONMemory Capacity: With 144 bytes of memory, they are sufficient for storing URLs, contact information, or other small data sets.SHOP NFCOverall, these NFC tags are reliable, easy to use, and offer excellent value for various NFC applications. Highly recommended!

They are very small, about the size of 1/3 postage stamp. Work good , can be programmed by iPhone and android .