This is a low frequency (125Khz) RFID Reader With Serial Output with at range of 8-12cm. It is a compact unit with built in antenna and can be directly connected to the PC using RS232 protocol. Since this also outputs Serial TTL Level Data (TX/RX), this can also be directly connected to the Serial Port of any Microcontroller.
This product is a kind of play and plug device with a reading range of 8 to 10 cm and can be availed in the following specifications.

Specifications

• Input Voltage: 5 V DC - 12V DC
  
• On Board Voltage Regulator
  
• Operating Frequency: 125 khz
  
• Read Distance: 8 to 10 cm
  
• Size:  32 mm (length), 32 mm (width), 8 mm (height)
  
• Serial or RS232 Output