Product description:

RDM6300 125KHz card reader mini-module is designed for reading code from 125KHz card compatible read-only tags and read/write card . It can be applied in office/home security, personal identification, access control, anti-forgery, interactive toy and production control systems etc.
Details
Overview:
RDM6300 125KHz card reader mini-module is designed for reading code from 125KHz card compatible read-only tags and read/write card . It can be applied in office/home security, personal identification, access control, anti-forgery, interactive toy and production control systems etc.

Features: Support external antenna
Maximum effective distance up to 150mm
Less than 100ms decoding time
UART interface.
Support EM4100 compatible read only or read/write tags
Small outline design
Hardware