Function: 1. Clear Display: 240 x 240 HD color display, directly reading multiple parameters of forward and reverse power standing wave. 2. Operation safety: supports delayed shutdown function, auto start function, battery low voltage protection function, dual LED indication function. 3. Convenient Adjustment: Supports power fine-tuning function, standing wave fine-tuning function, Chinese and English menu with one key switching function, one key buzzer on and off function. 4. Simple setting: supports multi-display interface one-button switching function, user-defined standing wave alarm setting function, and user-defined shutdown delay time setting function. 5. Easy portability: With its compact size and light weight, the SWR meter is easy to carry and store for indoor and outdoor use. Specification: Item Type: SWR Meter Operating frequency: 1.8-54MHz Measuring range: 0.5-120W. The SSB mode can reach a maximum of 200W, 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 set manually through the function. Charging interface: Type C 5V 1A. Battery model: 3.7V 1000mAh rechargeable lithium battery, comes with built-in battery. Interface type: UHF SL16. Case Size: Approx. 88 x 63 x 38 mm / 3.46 x 2.48 x 1.5 inches, excluding protruding parts. Package List: 1 x SWR Meter