Magic Card
Ultimate Magic Card
4B UID S70 4K KeyFob
6-in-1 KeyFob
NTAG 213 215 216
NTAG ISO15693
UHF 900MHZ TAG
RFID Reader
PN532 BLE
PCR532
iCopy-XS
NFCKill Pro
125KHz T5577 Cloner
RFID Emulator
RF Detector
Chameleon Lite
Chameleon Mini
Chameleon Mini 2022
SDR
WiFi Killer
Deauther Watch V2
WiFI Deauther MiNi
LAN Hack
Shark Jack
Packet Squirrel
USB Hack
Plugin
店小秘 PayPal 物流同步
Product Category Banner
YMM Car Bulb Size
Attributes Separator
OpenAI Reviewer
Code
MTools Activation Code
RFID Tools Supported
MTools Supported
MTools Lite Supported
Chameleon Supported
WooCat – Sales Report Client
ChameleonTiny Manager
MCalc
Chameleon Mini-
×
Proxmark3 X
1 × $79.99 -
4 Byte UID Changeable 1K S50 Key Fob
- Card Type:
UID
- Amount:
1 pc
- Discount:
Free
-
OTG Adapter - USB-C to USB-A
- Discount:
Free
Proxmark3 X 
4 Byte UID Changeable 1K S50 Key Fob 
OTG Adapter - USB-C to USB-A 
4 Byte UID S70 4K Magic Key Fob
$4.79
Mifare Classic S70 4K Key Fob with 4 Byte Writable UID.
The RFID Readers supporting this Key Fob are PN532, ACR122U, iCopy-XS, and Proxmark3 X.
Available on backorder
This is the 4 Byte UID changeable Mifare Classic 4k size key fob.
The UID can be modified ONLY with an external device (PN532, PCR532, ACR122U, Proxmark3 X, and iCopy-XS).
The UID cannot be changed with NFC on Android or iOS devices.
Command to Change UID
By All-in-one PN532 or PCR532
The latest features of the MTools Lite app support modifying the UID of the Gen3 7 Byte S70 4K card via Bluetooth PN532 Reader.
MTools Lite App can be downloaded from Play Store and App Store.
The PN532 Reader can be customized with the Bluetooth module. See the tutorial below to know how to make PN532 work with Bluetooth.
By Proxmark3 X or iCopy-XS
hf mf gen3uid --uid 11223344556677
By ACR122U
Windows Program Download Link: PCSC_Mifare_Secure.
Notice: Google Drive may recognize the PCSC Mifare Secure program as a virus cause it can detect the USB devices which it’s necessary to connect the reader. Absolutely it’s a clean and powerful program. Download the zip file with the browser on PC.
| UID Changeable | Yes (Backdoor Command) |
|---|---|
| Working Temperature | -20°C-70°C |
| Protocol | ISO14443A |
| UID Length | |
| Memory |
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$4.99 – $36.99
$24.99
$3.99 – $59.99
$2.00 – $22.50
Android Apps
iOS Apps
I’ve tried other key fobs before, but this one is by far the best. The 4 Byte UID and ACR122U compatibility make it a top choice!
This key fob is great! The 4 Byte UID feature is a huge plus. I was able to easily program it using my ACR122U reader.