The R-IN-UHF-9135U from IdTronic is a RFID Antenna with Frequency 864 to 869 MHz, Gain 8.3 dBic, Horizontal Beamwidth 68 Degree, Vertical Beamwidth 68 Degree, Front to Back Ratio 19.5 dB. Tags: Low Profile. More details for R-IN-UHF-9135U can be seen below.