DIGITAL DISPLAY: SWR meter has digital display for direct display of forward power, reflected power, antenna power, antenna efficiency, standing , battery voltage and accuracy. The standing meter is specially designed for car radio users or amateur radio enthusiasts with insufficient indoor space, with coaxial cable jumper for easy use. POWER RANGE: SWR watt meter power range of 0.5‑120W (up to 200W, FM, AM, CW mode is recommended for long term testing below 120W, SSB mode is optional,), a key display mode function, mode can be switched at will. At the same time, the control layout of the short power standing meter is convenient and easy to operate. RECHARGEABLE: Standing ratio meter built in 1000 mA large battery battery, no need for external power supply, battery undervoltage with buzzer alarm function. And, the meter turns on, shows red light when charging, green light when full, yellow light when the battery is under voltage, buzzer constantly prompts, and buzzer can be turned off with one key. VSWR: When VSWR is less than 1.5, the green light is on. When VSWR is greater than 1.5 and less than 2.5, the yellow light is on. When VSWR is greater than 2.5, the red light is on. When VSWR is greater than 2.5 and less than 3, the buzzer will intermittently alarm. When VSWR is greater than 3, the alarm will be continuous. DURABLE MATERIAL: Organic light emitting diode color screen digital display , the cover is made of aluminum, aluminum alloy shell wear resistant, not easy to rust, long service life. The tool is small in size and light in weight, very convenient for daily use and can be easily carried around.