The 92000 series of Coaxial Dynamics Digital Broadcast Elements are calibrated to exacting specifications to assure interchangeability with one another and may be used with any of our Digital Wattchman or High-Power Digital Wattmeters with appropriate size line sectionWe ensure element accuracy using RF Power Standards (NIST traceable) that are supported by more than 30 years of history and experience.Your confidence in the quality and dependability of the 92000 series of Digital Broadcast Plug-In Elements is assured with the Coaxial Dynamics Two Year Limited Warranty.Digital Broadcast Elements For 3-1/8″ (5/10/25 Scales)Frequency Range: 54-108MhzPower Rating: 2500 W Gold Plated For High Conductivity Calibrated to NIST Traceable Standards For Accuracy Two Year Limited Warranty