Feature: 1. STANDING WAVE METER: Commonly used tool for measuring the resonant state of antenna operation and transmitter transmission power. Commonly used to check if the antenna is working properly. 2. SHORTWAVE SWR: This standing wave meter is powered by radio frequency theft electricity and does not require batteries, making it easy to carry. 3. CONNECTION DETAILS: IN is the RF input terminal, OUT is the RF output terminal. Connect the IN terminal to the radio station ANT and the OUT terminal to the antenna. 4. LED INDICATOR: This SWR meter is designed with LED indicators, which can correctly and quickly display the working statues of the meter, for convenient use. 5. LOW POWER CONSUMPTION: Input power does not exceed 100W. The smallest LED light (green light corresponding to>1.0) requires 5W of power to light up. Specification: Item Type: Shortwave Standing Wave Meter Material: Alloy Steel Performance Parameter: Usage Frequency: 3 to 30MHz Power: 5-100W Insertion Loss: Less than 0.3dB Standing Wave: Less than 1.2 Interface: M base. Package List: 1 x Shortwave Standing Wave Meter