Seeed Grove - User Interface and Control Modules - Seeed Studio 113020002, The Grove 125KHz RFID Reader from Seeed Studio can measure RFID tags within 70mm when using uem4100 cards.
The reader is supplied with a detachable, plug-in antenna.
You can choose between two output formats, Uart or Wiegand.
Seeed 113020002 Grove - 125KHz RFID Reader UART or Wiegand Outputs