Digital Display: SWR power meter has OLED color screen digital display, directly showing forward power, reflected power, antenna power, antenna efficiency, standing wave, battery voltage and accuracy. The standing wave meter has compact structure, easy to carry, small size and light weight. Designed for car radio users or radio amateurs with limited indoor space. Power Range: The power range is 0.5-120W (up to 200W, FM, AM, CW mode recommended for long-term testing below 120W, SSB mode optional). Features one-key display mode function for easy switching. Charging Display: Built-in 1000mAh battery, no external power supply needed. Includes buzzer alarm for low battery. Red light indicates charging, green light when full, yellow light for low battery with buzzer prompt (can be turned off with one button). VSWR Value: Green light when VSWR is below 1.5, yellow light for 1.5-2.5, red light above 2.5. Buzzer alarms intermittently for VSWR 2.5-3, continuously above 3. Aluminum Alloy, Portable Size: Cover plate made of aluminum alloy, wear-resistant and corrosion-resistant. Compact size for easy daily use and portability.