Features 1.No Power Supply: DIY digital power standing wave meter, small and portable, built in rechargeable battery, no external power supply. 2.Digital Display: SWR meter can directly display forward power, reflected power, antenna power, antenna efficiency, standing wave, battery voltage. 3.High Accuracy: Digital standing wave meter's accuracy meets the needs of amateurs, high standing wave, battery undervoltage buzzer alarm function. 4.Power Range: 0.5W?120W (up to 200W, below 120W long term test recommended FM, AM, CW mode, SSB mode optional), one touch display, mode switching function. 5.With Indicator: Red light is displayed when charging under power on, green light is displayed when full, yellow light is displayed when undervoltage. specificationItem Type: Standing Wave Meter_x000D_ Material: Aluminum Alloy_x000D_ Color: Black_x000D_ Battery: Polymer Lithium ion Battery 503450 (Built in) Capacity: 1000mAh_x000D_ Charging Interface: Type C_x000D_ Frequency Range: 1.8MHz-50MHz (Actually Has Reference Value for V band)_x000D_ Power Range: 0.5w-120w (up to 200w, Below 120w Long Term Test Recommended FM, AM, CW Mode, SSB Mode Optional)_x000D_ Measurement Accuracy: