Specifications Product Name Digital SWR Power MeterFrequency Range 1 6 50MHzPower Measurement Range 0 5W 150WSWR Measurement Range 1 0 99 9Insertion Loss 0 12dBInsertion SWR ≤1 02Measurement Accuracy Better than ±5 SWR Alarm ≥2 0 with disable function RF Connector Type SL16 M or N default is M Display Content Forward Power SWR Antenna Power EfficiencyPower Supply Built in 3 7V 1000mAh rechargeable lithium battery or USB Type CShutdown Power Consumption 0 1uAData Communication USB Type CFirmware Upgrade SupportedOverall Size 88 x 38 x 64mm 3 5 x 1 5 x 2 5 inches excluding protruding parts Features High Accuracy Ensures measurement precision better than ±5 across the 0 5W 150W power range Multiple Display Modes Five interface display modes can be selected with a single button press SWR Alarm Buzzer alarm when SWR exceeds 2 0 providing immediate feedback Firmware Upgrade USB firmware upgrades without a programmer keeping your device up to date Long Battery Life Built in lithium battery provides over 50 hours of use on a full charge Package Included 1 x SWR Power Metermso bidi font family Times New Roman font size 10 5000pt mso font kerning 1 0000pt mso bidi font family Times New Roman font size 10 5000pt mso font kerning 1 0000pt