Simultaneous UHF RFID Reader - M6E Nano
The SparkFun Simultaneous RFID Tag Reader has numerous features that make it a huge leap forward over other RFID readers. The greatest feature is that the SRTR is able to read multiple tags at the same time. Additionally the read distance of tags is greatly increased from other readers and you can write your own data to the tags.
This board will read EPCglobal Gen 2 tags at up to 150 tags per second. Writing of tags is also possible at 80msec standard write. The board has adjustable power output from 0dBm to 27dBm, meaning that with an external UHF RFID antenna you can read up to 5 m, or up to 60 cm with the onboard antenna.
The SRTR is designed to work either with a USB to Serial connection to a computer or as a shield to an Arduino-compatible board.
More information is available on the website of Sparkfun.