Feature: 1. Clear Display: 240 x 240 full color HD display, directly reading multiple parameters of forward and reverse power standing wave. 2. Working Safety: Supports delayed shutdown function, automatic launch function, battery undervoltage protection function, LED dual indication function. 3. Convenient Adjustment: Supports power fine tuning function, standing wave fine tuning function, Chinese and English menu one key switching function, buzzer one key on and off function. 4. Simple Setting: Supports one button switching function of multi display interface, user defined standing wave alarm setting function, and user defined shutdown delay time setting function. 5. Easy Carrying: Comes with a compact size and a light weight as well, the SWR meter enables easy carrying and storage for indoor and outdoor use. Specification: Item Type: SWR Meter Operating Frequency: 1.8-54Mhz Measuring Range: 0.5-120W. SSB mode can get to 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 rechargeable lithium battery, shipped with built in battery. When the battery voltage is lower than 3.4v, the buzzer will ring for charging, and it will automatically close when the battery voltage is lower than 3.35v. Interface Type: UHF SL16. Casing Size: Approx. 88 x 63 x 38mm / 3.46 x 2.48 x 1.5in, excluding protruding parts. . Package List: 1 x SWR Meter