OverviewRDM6300 125KHz cardreader 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.FeaturesSupport external antennaMaximum effective distance up to 50mmLess than 100ms decoding timeUart interfaceSupport EM4100 compatible read only or read/write tagsSmall outline design