PCR120 is a Mini portable battery-powered RFID reader with LCD and built-in real time clock for data collection applications. PCR120 is designed for 125Khz Proximity card data collection anytime and anywhere without computer connectivity.How does PCR120 work? The data is read from PCR120 RFID card reader and shown on the display and kept into the memory with time stamp and downloaded to the computer via serial port or USB.