Compact and weight, powered by RF-tapped power, with no batteries required, and easy to carry, very suitable for amateur radio enthusiasts to use in the field. ^^ It can be used to measure radio frequency signals, it uses 5 LEDs to indicate the strength of the signal, with different colors of LEDs to indicate different SWR s. ^^ It is used to test the SWR of short radio signals in the frequency s of 3-30MHz. The input power does not exceed 100W, and the smallest LED (> 1.0 corresponding to the green )
requires 5W power, suitable for various short radio equipment. ^^ This equipment is commonly used in radio communication systems such as radio broadcasting, television broadcasting, and radio communication. ^^ It helps the operator to determine the strength of the signal and thus adjust the settings of the radio equipment, to improve the quality and reliability of the signal.