The 2.45 GHz Gain Adjustable RFID Reader uses a built in omni-directional antenna allowing it to identify transponder tagged items up to 100 meters in all directions. Users can adjust the identification distance from less than 5 meters to 100 meters according to actual situations in order to make identification more accurate. The reader uses an advanced 0.18 µm CMOS IC for ultra-low power. This active reader uses WiFi (802.11b wireless communication standard) for data transmission to a host system. In addition, the WiFi Reader has dual operating modes allowing for the upload of data in real time or data buffering for later retrieval.