1. It is small and light, powered by tap power, no battery required, easy to carry, and very suitable for amateur radio enthusiasts to use in . 2. It can be used to measure signals, and it uses 6 LEDs to indicate the power strength and SWR range of the signal. 3. It is used to test the signal-to-noise ratio of shortwave radio signals with a frequency range of 1-30MHz. The input power does not exceed 12W, and the LED light corresponding to the minimum display value requires 0.5W power, which is suitable for various shortwave radio equipment. 4. The device is commonly used in radio communication systems such as radio broadcasting, television broadcasting, and radio communication. 5. It helps operators determine the strength of the signal and adjust the settings of the radio equipment to improve the quality and reliability of the signal. There are no components that need to be adjusted in the entire circuit, and it can work normally as long as the connection is correct. IN is the input and OUT is the output. IN is connected to the ANT and OUT is connected to the antenna. It can be used in the shortwave range without any calibration and adjustment, which is very simple and convenient for DIY enthusiasts. Name: SWR meter Frequency: 1- 30mhz Maximum measured power: nominal 10W, actual 12W Minimum measured power: 0.5W Interface: SO239 Maximum short-term power at full SWR meter resolution: 7W Current drawn from ceiver to power circuit: 1.2mA (Different batches may have different printed words, which not affect the use) colour: Black Material: PCB Package Contents: 1 x SWR meter power meter (divided into 2 specifications, BNC interface and M socket interface) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.