TK28 is a CMOS integrated circuit for use in electronic Read Only RF transponders. It is compatible with EM format. 
The circuit is powered by external coil in an alternating magnetic field, and via one of coil terminal to get its clock from this field. 
The other coil terminal turns on and off the modulation current, the chip will send back the 64 bits of information contained in a factory pre-programmed memory array.

MANGO is a trademark was born in 2004!  As a famous trademark, MANGO is well-known in China as well as overseas.
TK28 mango proximity card with best quanlity in the market.

Feature
* Read only, Manchester, compatible with EM4200/ H4200
* On chip voltage limiter
* Full wave rectifier on chip
* Large modulation depth due to a low impedance modulation device
* Very small chip size convenient for implantation
* On chip 480PF resonance capacitor
* Operating frequency 100-150 kHz, typical frequency:125KHz
* Low power consumption

Application

Employees ID Card
Animal Tag
Access Control ID Card
Time Attendance ID Card
Read only memory in identify serial number
Automatic Management
Industial Production

There is no any printing content on the blank card. Many customer order large quantity blank card.
They print the blank cards by their printer that can save a lot of cost.
Generally laminated coated overlay should be added on blank card, and then it is printable by customer.

Other available option: magnetic strip,barcode,embossing number, signature panel, Pin number,
serial number, scratch strip,hot-stamping,chips,etc.
Available crafts: magnetic strip, scratch off strip,signature panel,
serial number(thermal ,inkjet and embossing Nos), hot-stamping, laser/hologram.
Printing: Silkscreen printing, offset printing, digital printing, inkjet printing, etc

We accept custom material and artwork/design order

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About US:

D&H SMARTID CO., LTD, one of the most professional manufacturer of contact and contactless smart cards, smart tags and RFID reader.
Since 2000, we provided billions of smart card/ RFID tag to our clients worldwide every year.