1Maximum measurable power range up to 200W. 2Powered by AAA batteries/external USB port. 3LED backlight display for easy reading. 4Forward/Reversed/VSWR ration in one push button. 5Convenient control layout for ease operation. Features:100% brand new and premium quality.Maximum measurable power range up to 200W.Powered by AAA batteries/external USB port. LED backlight display for easy reading.Forward/Reversed/VSWR ration in one push button.Convenient control layout for ease operation. Specification:Condition: 100% Brand NewMaterial: ABSColor: BlackFrequency range: 1.6-60 MhzPower range: 0-200W +/- 5%Testing functions: Fwd/Rev Power, SWRInsertion loss: 0.3dB or lowerImpedance: 50 ohmPower supply: "AAA" battery (NOT INCLUDE)or Micro USB portPackage Weight: Approx. 301g/10.6ozBattery installation:1.Remove the black screw from the cover to open the rear panel.2.Can be used with alkaline or Ni-Ca, Ni-MH rechargeable battery.3.This unit has no built-in charging circuitry.4.Be sure to correct polarity of battery.5.Remove the battery if the unit won't be used in long period. Package List:1 * Standing Wave Meter1 * Manual(English)