hiwe need UHF RFp USB ReaderWater Interface Protocol: EPCglobal UHF C1 G2 ISO 18000-6CRF Spectrum: 860-960 MHzChip: chip PR9200Reading speed:> 50 tags per secondInterface: USB 2.0, RS-232 Wiegand 26, Wiegand 34Output Power: 18-26dBmAntenna: 2dBi Circular Polarization AntennaReading Distance: Max 2 metersColor: Black, Gray, Yellow