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Key Features:

DC3.3V ~5V power supply, UART-TTL interface；
Compliant with ISO14443A standard,
Read/Write or Read only UID of MIFARE® Classic 1K /4K,MIFARE Ultralight®, MIFARE Ultralight® C etc
Available with E-wallet increment, descrement, backup value, etc;
External antenna, reading range up to 5 ~ 7cm
External LED and BUZ available ( external driver circuit needed)

Technical Parameters:

Electrical Specification    
Power supply    DC 3.3V ~ 5V
Power consumption     Max current：<50mA,   Standby current: <1 mA
Operation frequency    13.56MHz 
Baudrate    9600~115200 bit/s ( default 9600bps)
Interface     UART TTL
Antenna    External, stamp hole
Reading range     Up to 4 cm ~ 10 cm( depends on antenna and cards)

Mechanical Specifications     
Dimension     25mmx16.5mmx2.8mm (LxWxH)
Weight     3g 
Material     FR-4, Blue 
Model    CHK302MT

Environmental Conditions     
Operation temperature    -20°C～ +80°C
Storage temperature    -40°C～ +85°C
Humidity     Relative humidity 5%～95%

Supported Standard/ Tags    
ISO14443A     Read/Write: 
MIFARE® Classic 1K /4K, MIFARE Ultralight®, MIFARE Ultralight® C, NTAG 21x 

Read UID only: 
Read UID only of all other ISO14443A RFID tags 

SDK information     
Demo software     WINDOWS,  C# language 
Files     Comprotocol document 
API document
User Manual
Demo.exe 

Note:  Other functions and details to be continued and upgrade