Features 1??Maximum measurable power range up to 200W. 2??Powered by AAA batteries/external USB port. 3??LED backlight display for easy reading. 4??Forward/Reversed/VSWR ration in one push button. 5??Convenient control layout for ease operation. Specification Features: 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: Material: ABS Color: Black Frequency range: 1.6-60 Mhz Power range: 0-200W +/- 5% Testing functions: Fwd/Rev Power, SWR Insertion loss: 0.3dB or lower Impedance: 50 ohm Power supply: "AAA" battery (NOT INCLUDE)or Micro USB port Package Weight: Approx. 301g/10.6oz Battery 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 Meter 1 * Manual(English)