ETEKJOY 100PCS 13.56MHz RFID Key Fob Proximity IC Card ISO14443A Token Tag for Electronic Smart Door Lock, Compatible with MIFARE Classic 1K Card M1, Read-Only (Black)

These are exactly what I was looking for. They are pre-programmed with non-overlapping codes. They work with the Ubiquiti Unifi Access door readers (when third-party "cards" allowed setting is turned on). They seem plenty sturdy and include two metal loops (small and large) on each for easy attachments. Reasonable price. I have only used 10 or so thus far, but none have failed yet.

These worked great with Ubiquti UniFi Access System that I just installed. These are very cheap and easily replaceable if lost. I know they are not the ultra secure keyfobs but they worked great for my application.

Worked great with a Unifi access control system.

They work great, fast shipping, very economical. Thank you

I love these key fobs for use with UniFi Access. They are not able to be copied by easily available methods. They fit well on my keys, however the key rings included don't last and make it easy to lose the fob. I solve this by buying stronger key rings separately since they're cheap enough. Of the batches I have seen, there have been 2 in 300 that had a defect in the plastic allowing you to see the coil. They still worked, but I didn't want to risk them falling apart so I don't use them.

They are inexpensive and they have a decent range. Works good with our Hikvision access system. Would recommend.

I have 4 Schlage "CONTROL" series locks that work with MIFARE CLASSIC and DESFIRE credentials. They support both 125khz and 13.56 MHZ bands. These tags DO NOT work with this system. That may be due to the tags not being encrypted, since they are read-only. That is a huge security violation and makes sniffers and cloners VERY EASY to capture the tag's serial number as it is being presented. If you're using these tags for door locks, you seriously need to re-consider your lock and tag choice, and get an encrypted one. Second, the physical tags are very cheaply made, and they're not glued or sealed. it is far too easy to break the cheap, flimsy plastic, and the cover over the chip and antenna pops out easily. It really wouldn't be that much more difficult to seal or glue them, especially considering that the chip is sitting on epoxy already and it would be just as easy to squirt a little more epooxy in there to hold the cover on. I don't understand how these have a 100% perfect 5-star rating. They're terrible! Not encrypted, cheaply made, fall apart easily, and NOT compatible with the MIFARE CLASSIC 1k system that they claim to be. I am giving 1 star mostly because of the cheap construction, but also because of the incompatibility.

Good

Vendor was very friendly when answering questions I had about the product. Keys work as expected.

Very good performance