Delayed shutdown function, transmitting automatic startup function, and battery undervoltage protection function. LED dual indication function Power fine-tuning function, standing wave fine-tuning function. One button switching function of Chinese and English menus Buzzer one key on/off function One button switching function of multiple display interfaces Customized standing wave alarm setting function Customized shutdown delay time setting function Specifications: Operating frequency: 1.8-50Mhz Measuring range: 0.5-120W (SSB mode can reach 200w at most, and the buzzer will alarm when it exceeds 200w) Standing wave range: 1-99.9 (the default alarm is greater than 2.0, and the alarm point can be manually set through the function) Charging interface: Type_ c 5v/1A Battery model: 3.7v/1000mAh (when the battery voltage is lower than 3.4v, the buzzer will ring for charging, and it will automatically shut down when the battery voltage is lower than 3.35v) Interface type: UHF (SL16) Shell size: 88mm x 63mm x 38mm (excluding protruding parts) Colour: Black Material: aluminum alloy Package Contents: 1 x SWR Meter