1,INTUITIVE DISPLAY: SWR power meter supports positive and negative power standing wave, with 1.3in color TFT display, direct reading of various parameters 2,MULTIPLE FUNCTIONS: SWR meter has the function of delayed shutdown, automatic launch startup, battery undervoltage protection, LED dual indicator, power fine tuning, standing wave fine tuning, one click switch between Chinese and English menus, one click switch between multiple display interface, custom standing wave alarm setting, and custom shutdown delay setting 3,ACCURATE AND PORTABLE: DIY digital power standing wave meter is small and portable, built in rechargeable battery, no need for external power supply, direct display of forward power, reflected power, antenna power, standing wave, battery voltage, accuracy to meet the needs of amateurs, possess high standing wave, battery undervoltage buzzer alarm function 4,SWITCHING MODE: The power range of standing wave meter is 0.5W‑120W, with a maximum of 200W. For long term tests below 120W, FM, AM, and CW modes are recommended. SSB modes are optional, one key display mode switch function, switch mode at will 5,INDICATOR AND ALARM: When power wattmeter is on, display red light when charging, green light when full, and yellow light when undervoltage. When VSWR is less than 1.5, the green indicator is on. When VSWR is greater than 1.5 and less than 2.5, the yellow indicator is on. When VSWR is greater than 2.5, the red indicator is on, if the standing wave is greater than 2.5 and less than 3, the buzzer will alarm intermittently, if the standing wave is greater than 3, (aisanray) will alarm continuously. If the battery is under voltage, the buzzer keeps warning, the yellow indicator is on, and the buzzer can be turned off with one key Item Type: SWR Power Meter Material: Aluminum alloy Operating Frequency: 1.8-54Mhz Measuring Range: 0.5-120W(SSB mode can be up to 200w, more than 200w buzzer alarm) Standing Wave Range: 1-99.9(default greater than 2.0 alarm, alarm point can be manually set by hiding function) Charging Interface: Type C 5V 1A Interface Type: UHF(SL16) 1 x SWR Power Meter 1 x Connecting Cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.