Specification Working Frequency 0 1 3000 MHzReturn Loss more than 35 dBConnectors SMASize of the board approx 45 90mmWith this known RF SWR Bridge board you can measure in thru mode filters amplifiers and in reflective mode antennas impedances inductance capacitance and impedance matching etc Can be used with HiQSDR or compatible SDR Transceivers with N2ADR software and NWT series of USB RF Analyzers Fine workmanship and good performance Easy to use Long service life Note DIY item if necessary please replace the resistance element yourself Package includes 1 x RF SWR Reflection Bridge