RFIDREAD-mRW-232 Reader Writer module

Reads EM4100 compatible transponders. (64bit Manchester Encoding).
Reads and Writes T5557 transponders (32cyc/bit  Manchester Encoding).
Read Distance: 8cm for cards, and 5cm for keytags.
5.5V-15V input supply  @ 40mA.
DB9 connector for direct connection to a RS232 serial port.
Small Unit size:  66mm x 36mm.
Output connections to drive dual color LED and Buzzer

Its features are: 

This low cost RFID reader writer module is optimized for 125Khz transponders. It is able to read EM4100 Tags as well as perform read and write operations for the popular T5557 RFID transponders which carry 224bits of Read/Write data.

RFID Reader Writer module with RS232 Interface
Reads 125khz EM4100 tags, Reads and writes T5557 tags