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🔐 Unlock dual-frequency mastery with the ultimate rewritable ID card!
This Writable Dual Chip UID Changeable MF1 1K card combines 125 kHz and 13.56 MHz frequencies in one rewritable, UID-changeable card. Designed for cloning, backup, and multi-application use, it supports major protocols like EM4100 and Mifare Classic, requiring no external power and fitting comfortably in your wallet. Ideal for professionals needing versatile, secure, and customizable access control and identification solutions.
| ASIN | B07MJ7JNVV |
| Best Sellers Rank | #85,693 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #48 in Commercial Access Cards |
| Customer Reviews | 4.4 4.4 out of 5 stars (65) |
| Date First Available | January 7, 2019 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.89 ounces |
| Item model number | xc121 |
| Manufacturer | xcrfid |
T**O
Both chips worked using Flipper Zero
I used these to clone a Schlage 9691T fob, which in my case uses 125 kHz RFID for gates and building entry, and 13.6 MHz NFC for the Schlage BE467F unit entry door lock. It worked fine (both protocols) using a Flipper Zero. Cloning the 125 kHz RFID portion was trivially easy. Cloning the 13.6 MHz NFC portion using the Flipper Zero required some work and time, and probably shouldn't be attempted by those that don't have experience or understanding of these protocols UNLESS they are willing to take the time to research and follow instructions to the letter. But after getting past the hurdles, it worked great. I'm very happy with these cards.
C**H
Exactly as described!
Proxmark3 detects a T55x7 (consistent with a T5577) and a Mifare Classic or Plus (either are 1k+). I've cloned cards to both chips successfully and they work exactly as they should. These two chips in one card gets you the ability to clone just about anything to these as needed and can be used independently (one credential on each chip for two different credentials on the same card). They're a tiny bit thicker than a credit card (.037" versus a credit card's .032"), but thinner than HID cards that I've carried in the past. They're plenty flexible and ride nicely in a wallet. There's enough space around the antennas (visible with a bright light source) that you could punch out a lanyard hole if you were careful. I'd recommend these for anyone looking for an all-in-one card!
M**I
very good to copy
you can almost copy any type of card as long as you have the right device to decode and encode and within the frequency range of the card including shearable cards
A**R
Does what is needed
Ordered for creating clones of AC cards, does a pretty solid job of "base" access, but ran into issues for some areas, overall nothing some quick thinking and tailgating can't fix.
D**.
Great for Flipper Zero Owners
I used the Flipper to clone a HID Prox to the LF portion and a MIFARE Classic 1k S50 to the HF portion. Test reads confirmed the results. Two cards in one, you can’t beat it.
A**R
Gen1A
This has a Gen1A magic chip and LF chip. A great work.
F**B
Only rewritable with backdoor commands
I wish sellers would clearly state the technical details of products like this. The Mifare 1k part of these are Gen1a, not Gen2, so you can only write block 0 with specialized tools (and many modern card readers will reject them because of the backdoor commands). If you're looking for a card you can write with your phone, these aren't that.
C**F
Only dual chip rewritable cards around.
Ordered 5 and they all worked on both frequencies. I then ordered another 60. Very satisfied with this find.