Features 1、BUILT IN RECHARGEABLE BATTERY: Standing wave meter is compact and portable, small in size and light in weight, with a built in rechargeable battery, no external power supply required, and a buzzer with alarm function when the battery is under voltage. 2、DIGITAL DISPLAY: Short wave power standing wave meter has a digital display that directly shows forward power, reflected power, antenna power, antenna efficiency, standing wave, battery voltage and accuracy. 3、POWER RANGE: Shortwave power standing wavemeter has a power range of 0.5‑120W (up to 200W, FM, AM, CW mode recommended for long term testing below 120W, SSB mode optional), one key display mode function, modes can be switched at will. 4、CHARGING STATUS: Digital standing wave meter is on, red light is displayed when charging, green light is displayed when full, yellow light is on when the battery is under voltage, the buzzer is constantly prompted, the buzzer can be turned off with one key. 5、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 alarm intermittently. When VSWR is greater than 3, it will alarm continuously. Specification Item Type: Standing Wave Meter Material: Aluminium Alloy Colour: Black Battery: Li Ion Polymer 503450 (Built In) Battery Capacity: 1000mAh Charging Interface: Type C Frequency Range: 1.8‑50MHz (Actually Has Reference Value for V Section) Power Range: 0.5‑120W (Up to 200W, FM, AM, CW Modes Recommended for Long Term Testing Below 120W, SSB Mode Optional) Measurement Accuracy: <±5% VSWR Range: 1.0‑99.99 Access Interface: SO239 Package List 1 x Standing Wave Meter