Features: 0.96inch OLED display, you can see the forward , reverse and standing waves clearly.With 2-54MHz frequency ranges, 0.5W-120W measurement ranges, 1.0-99.9 VSW measurement ranges.According to the fitting of the detector diode characteristics let the precise of the whole ranges within 0.5W-120W superior than 4%.Equipped with alarm function, when the standing waves greater than 2.0 it will promote a beep alarm.Input and output intelligent detection function. One button switch function. Support serial communication to upload data.Specifications:Name: Standing-wave MeterFrequency ranges: 2-54MHz measurement ranges: 0.5W-120WVSW measurement ranges: 1.0-99.9Insertion loss: Less than 0.2dBMeasurement accuracy: 4%Impedance: 50VSWR alarm: 2.0 ( Greater than 3.0 buzzer continue beep)RF interface type: (default M)Display content: forward , reverse , standing wave supplys: built-in 3.7V/1000mAh rechargeable lithium battery (included) or USB type-cScreen size: 0.96 inchScreen type: OLEDData communication: USB type-cFirmware upgrade: SupportMaximum measurement : 120WMaterial: Metalcolour: blackPackage Contents:1 x Standing-wave Meter1 x Type-C CableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.