This is a DIY kit that requires self-assembly, helping to enhance practical skills. It operates effectively across broadband frequencies, covering amateur radio HF bands from 1.8 MHz to 50 MHz. Maximum current consumption is 400 mAh, with 7 inductance and 7 capacitance components. Compact and lightweight design allows for easy portability and convenient use anywhere. Equipped with an OLED screen for clear data display, enhancing the overall user experience. Power measurement resolution: 0.1 watt for powers under 10 watts; 1 watt for powers above 10 watts. Power measurement accuracy: 10%. Maximum inductance setting: 8.53 H. Minimum inductance step: 0.05 H. Maximum installed capacitance: 1869 pF. Minimum installed capacitance: 10 pF. Type: DIY kit Color: Black Material: Plastic Dimensions: Approximately 128 x 62 x 20 mm OLED screen size: 28 x 27 mm (1.1 x 1.1 inches) Weight: 129 g (4.6 ounces) Package Contents: 1 x PCB 1 x OLED 1 x Accessory Note: The package includes only the items listed above. Other products are not included. Lighting and display settings may cause slight variations in the color shown in images compared to the actual item. Measurement error allowance: 13 cm.