RFID UHF Antenna with Low Price, High Performance, International Approvals, Small Orders Accepted, Prompt Delivery. 1.Dimension(mm): 36*36*4 2.Center Frequency(MHz): 868MHz,902-928MHz 3.V.S.WR(in BW): 1.3 4.Band Width(MHz): 3.5 5.Gain(dB): 2.2 6.Insertion (Ω): 50 7.Polarization: RHCP 8.Frequency Temperature Coefficient(ppm/°C): Reader Electrical specification can be customized.