Key Features:

3.3V ~5V power supply, UART-TTL interface;
Tiny size, single-face laying components with stamp-hole
Compliant with ISO14443A/B, ISO15693, ISO18092 Standard
Support ISO7816 standard PSAM/CPU card;
Read/Write or Read UID only working mode
Support to create standard Data file, Back-up Data file, Value file, Linear Record file, Cyclic Record file and Transaction MAC file)
Support KEY Authenticate,get KEY Version, change KEY, etc;
Available to operate DESFire PICC level, Application ID create/delete/format, etc
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                            CHK304MT

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

Supported Standard/ Tags 
ISO14443 A  Read/write:
MIFARE® Classic 1K /4K, MIFARE Ultralight®, MIFARE Ultralight® C, MIFARE® DESFire®EV1, MIFARE® Smart MX, MIFARE® Plus S / X, MIFARE® Pro X, NTAG 21x

Read UID only:
Read UID only of all other ISO14443A RFID tags
ISO14443 B            SRI4K, SRIX4K, AT88RF020, 66CL160S, SR176
ISO15693               EM4135, EM4043, EM4x33, EM4x35, I-Code SLI / SLIX, M24LR16/64, TI Tag-it HF-I, SRF55Vxx (my-d vicinity)
ISO7816                PSAM T=0,T=1

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