<< Back

Dual frequency RFID key fobs with 13.56 MHz and 125 kHz chips
(Product ID: 1680)

125 KHz & 13,56 MHz
Do you want to use a single RFID key fob for your 125 kHz system to access control system and your 13.56 MHz system for monitoring working hours?

Check out our dual frequency key fobs with a combination of the TK4100 and F08 chips. These two 125 kHz and 13.56 MHz chips are very popular and used in various RFID applications.

The dual frequency key fobs have a popular tear-shaped housing measuring 40 x 32 x 4.5 mm and are available in multiple colors (blue, gray, black, green, red, orange, and yellow).

The TK4100 chip is a read-only chip that operates at a frequency of 125 kHz. It has a pre-programmed chip ID number and is used in countless applications worldwide.

The F08 chip is an ISO/IEC 14443 chip with a preprogrammed 4-byte long unique ID number and a storage capacity of 1 kB.

For orders above 100 pcs, we can do various customization services like printing company logos, serial numbers, or other personalization.

You are welcome to buy the dual frequency key fobs from stock or send us an inquiry for customized key fobs.
Price/item: 0,82 EUR (with vat 1,00 EUR)
Status: In stock
Dispatching time: 1-3 days

Keyfobs Colour:


Product ID: 1680


82,00 EUR

Total with vat:
100,04 EUR
Add to cart
Do you need print or other specific requirements?
Send inquiry


Quantity Price/pcs
≥ 1 1,13 EUR
≥ 10 1,00 EUR
≥ 25 0,90 EUR
≥ 50 0,86 EUR
≥ 75 0,84 EUR
≥ 100 0,82 EUR
≥ 150 0,80 EUR
≥ 200 0,76 EUR
≥ 300 0,74 EUR
≥ 500 0,72 EUR


These dual frequency RFID key fobs contain two widely used proximity chips and can be used to unlock the electronic locks, recording attendance at work, and for identifying users in countless other applications.

The TK4100 RFID chip is a very popular 125 kHz read-only chip that works like the EM4200 and his predecessors EM4100 and EM4102. It has a preprogrammed unique ID number which is used as a key identifier for access control systems and other identification purposes.

The F08 is an ISO 14443 chip, it has a preprogrammed 4-byte long unique ID number which is used as key identifier in various RFID systems operating at 13.56 MHz, and has a storage capacity of 1kB bytes for storing transaction details or other information.

The dual frequency RFID key fobs have a very common tear-shaped housing measuring 40 x 32 x 4.5 mm that is made from ABS material. They are available in multiple colors (blue, gray, black, green, red, orange, and yellow). 

By default, they do not contain the numeration or other printed elements, but if you need customization, please let us know and we will send you an offer.

Options for customization (for pricing please send us an inquiry)

RFID key fobs of any color

If you need RFID key fobs with a specific color, please send us the inquiry with the color number from a Pantone scale and we will check if there is a possibility to produce such key fobs.

RFID key fobs with custom print or serialization

RFID key fobs are usually without any serial numbers or other print, but when needed we can personalize the key fobs, too. For personalization, we usually use a UV printing technology that prints white in addition to CMYK colors. This way we print high quality company logos in nice bright colors.

When we have to serialize the key fobs with chip ID codes, we take extra care that we print the code in the proper format. 
RFID key fobs with other RFID chips

There are a lot of different RFID chips and they differ in operating frequency, the amount of memory, reading distance, supported protocols, additional protection, or other functionalities.

If you need the RFID key fob with another chip or a specific combination of chips, please send an inquiry.

The RFID chips we use the most are:
•    13.56 MHz: MIFARE Classic®, MIFARE DESFire®, NTAG, ICODE®, MIFARE Ultralight, Fudan F08, etc. 
•    125 kHz chips: EM4200, TK4100, T5577, etc. 
•    UHF chips: Alien Higgs 9, UCODE 8, etc. 

Reading test for dual frequency key fobs

We tested our dual frequency key fobs with different kinds of readers and measured the reading distances. This is not an official test, but was made to inform you what reading distances you may expect with your application.

RFID reader Reading distance
ACR1252U 3 cm
SYRIS RD300-H1-G 0,5 cm
SYRIS RD200-M1 2 cm
R80C 2,5 cm
Promag PCR-330M-00 1 cm
Syris RD200-LF 2 cm
Promag PCR-330A-00 125 kHz RFID Card Reader 3 cm
125 kHz RFID reader R80D 2 cm

The reading distance between the key fob and the reader is affected by many different factors, like the size of the antennas and quality of the chips, the interferences of metal, and electromagnetic signals, etc.

Technical specifications for dual frequency key fobs with TK4100 and F08 chips

Chip: TK4100
Compatible with: EM4100, EM4102, EM4200
Frequency: 125 kHz
Reading distance: up to 10 cm

Chip: F08 1k
Chip manufacturer: Fudan
Chip: F08 1k with a 4-byte long ID
ISO/IEC standards: 14443-4A/B 
Memory size: 1 Kbytes of data
Operating frequency: 13.56 MHz
Reading distance: up to 10 cm (usually up to 5 cm)

Key fob dimensions: 40 x 32 mm
Thickness: 4.5 mm
Material: ABS

If you need larger quantities or personalized dual frequency key fobs, please send us an inquiry with your specification.

Related products

For better performance this website uses cookies! Do you want to learn more?
Do you allow storing cookies on your computer for this purpose?