This is the ID-20LA , very simple to use the RFID Innovations ID reader module. With a built-in antenna , the only protrusion is the 2mm pin spacer . Just power the module, use a 125kHz card , and get a serial chain output that contains the card's unique identification.

This is an os card for our RFID readers . The SparkFun L eid RFID Breakout converts the 2mm pins to the breadboard in a friendly 0.1 "headers. With this ability the ID-3LA, ID-12LA, and ID-20LA you can weld the reader directly to the header or use the 2 mm connectors

This module uses Nordic Semiconductor's newest 2.4 GHz transceiver , the nRF24L01 + . This IC transceiver operates in the 2.4 GHz band and has several new features!

The RFID Smart Lock can provide good security protection for your personal items, in addition to protecting your privacy. It can also improve the safety of children at home, prevent them from being free to open drawers or cabinet doors.

Each Card pre-programmed with a unique identification number, printed on the card. The Identification Card is suitable for the 125KHZ Card Reader and the Reading Distance is 0cm to 10cm. Used in Identification, Financial Identification, Access Control Systems, Low Frequency Identification Cards and so on. Read-only, not HID card.

It is an easy to use Sensor ID 125Khz Card Reader. Quick to read RFID tags. Plug and play, no extra driver needed. Used in many RFID application systems, such as personnel identification, logistics, access control, conference system, anti-counterfeiting system and industrial production process control.

The MF RC522 is a highly integrated read / write card chip used in 13.56MHz communication. It is a good option for the development of smart meters and portable devices. The MF RC522 uses advanced modulation concepts and vice versa and fully integrates all types of passive communication methods and protocols at 13.56MHz.

The MFRC522 operates in the frequency range of 13.56 MHz and uses the principle of modulation and demodulation to interact with the RF proximity card. This unit can perform the function of the card reading and writing device, to identify and record various information on the card, to encode and authorize an RF card.

The RFID USB Reader is a simple to use, USB to serial base unit for the ID-3LA, ID-12LA, and ID-20LA readers. 

This is a simple three track magnetic card reader with serial output.