High standing wave alarm function Delayed shutdown function, automatic power-on function for transmitting, and battery under-voltage protection function. LED light dual indication function (charging indication standing wave indication) Power fine-tuning function, standing wave fine-tuning function. One-click switching function between Chinese and English menus Buzzer one-click on and off function One-click switching function for multiple display interfaces Customized standing wave alarm setting function Customized shutdown delay time setting function Technical specifications Working frequency: 1.8-54Mhz Measuring range: 0.5-120W (SSB mode can reach up to 200w, and the buzzer will alarm if it exceeds 200w) Standing wave range: 1-99.9 (default alarm is 2.0, the alarm point can be set manually through the hidden function) Charging interface: Type_c 5v/1A Battery model: 3.7v/1000mAh (when the battery voltage is lower than 3.4v, the buzzer will sound for charging, and when the battery voltage is lower than 3.35v, it will automatically shut down) Interface type: UHF (SL16) Colour:Black Material:Metal Package Contents: 1 x SWR120 Standing Wave Meter 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. This digital standing wave meter is compact and portable, equipped with a full-color LCD display, which can directly display forward power, reflected power, antenna power, antenna efficiency, standing wave and battery voltage, accurately meeting the needs of amateurs. It has high-level radio wave alarm function. Delayed shutdown function, automatic launch function and battery under-voltage protection function. LED light dual indication function. Power fine-tuning function, standing wave fine-tuning function. Switch between Chinese and English menu functions with one click. 120w digital standing wave meter Direct reading of multiple parameters of forward and reverse power standing waves 240*240 full color HD display