Item Type: SWR Meter Material: Aluminum Alloy Display: 128x64 Organic Light Emitting Diode Display Battery: Polymer Lithium Ion Battery (Built In) Capacity: 1000 MA Frequency Range: 1.8MHz-50MHz Measurement Range: 0.5W-120W (SSB Mode Up To 200W, Over 200W Buzzer Alarm) Standing Wave Range: 1.0-99.99 (Default Greater Than 2 Alarm, Can Be Set Manually Through The Hidden Function Alarm Point) Insertion Loss: <0.1dB Interface Type: UHF (SL16) Charging Interface: Type C, 5V 1A Package List 1 x SWR Meter 1 x Cable 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. If the battery voltage is low, the buzzer will keep alerting. 1COLOR SCREEN DISPLAY: SWR watt meter has a digital display for direct display of forward power, reflected power, antenna power, antenna efficiency, standing wave, battery voltage and accuracy. 2EASY TO USE: SWR power meter is specially designed for car radio users or amateur radio enthusiasts with insufficient indoor space, with coaxial cable jumper for easy use. 3POWER RANGE: The power range is 0.5120w (up to 200w, fm, am, cw mode is recommended for long term testing below 120w, ssb mode is optional,), one button display mode function. 41000 MA BATTERY: Standing wave ratio meter built in 1000 mA large battery, no external power supply, battery undervoltage buzzer alarm function. 5BUZZER: When charging, it shows a red light, when full, it shows a green light, when the battery is under voltage, the yellow light is on, the buzzer keeps prompting, the buzzer can be turned off with one key. 6ALUMINUM ALLOY CASE: Short wave meter is made of aluminum alloy shell, wear resistant, not easy to rust, long service life. Compact structure, easy to carry, small size, light weight.