Surecom SW-102 125-525Mhz Digital VHF/UHF Antenna Power & SWR Meter+Connector VSWR. Forward and reflected power direct digital readout, without any calibration Maximum measurable power range up to 120W. low insertion loss (0.3 decibels or less) structure allows it to be permanently connected. Build in Frequency country . Frequency range: 100 - 520MHz