Feature:1. Automatic Tuning: The antenna tuner adopts automatic tuning, the ATU (Automatic Antenna Tuner) KIT independently developed by N7DDC, equipped with an OLED screen, and the data is clearly visible.2. High Quality Capacitors: The antenna tuner uses high quality brand chip capacitors, C channel capacitors, 1000V high voltage chip capacitors, and imported PIC chips.3. Radio Amateur Frequency Band: The antenna tuner can work effectively in the broadband overlapping radio amateur HF frequency band from 1.8mhz to 50MHz. The maximum current consumption is 400mA, 7 inductance and 7 capacitance.4. Easy to Carry: This is a portable antenna tuner, so you can take with you wherever you want to use.5. Interesting Install: The easy to install antenna tuner allows you to enjoy the fun of assembly, and is more professional, more stable and better in performance.Specification:Item Type:Antenna Tuner DIY Kits Material: PCBPurpose: Antenna TunerModel: ATU-100Maximum Current Consumption: 400mANumber of Installed Inductors: 7Number of Installed Capacitors: 7Power Measurement Step of 10 Watts: 0.1 wattsMeasurement Steps with Power Higher than 10: 1 wattPower Measurement Accuracy: 10 percent Maximum Installation Inductance: 8.53uhMinimum Installation Inductance: 0.05uhMaximum Installed Capacity: 1869pfMinimum Installed Capacity: 10pfUsage Scenario: The device is intended to be used in the components of amateur radio equipment, as a part of an amplifier or transceiver, or as a separate device that performs the function of matching the output impedance of a power amplifier (PA) with the antenna feeder. This device and the similar 2x5 group The relay is different, which allows it (with the maximum configuration) to work effectively in a wide frequency band, overlapping the radio amateur HF band from 1.8MHz to 50MHz..Package List:1 x PCB Board1 x Connection Line1 x IC2 x Plug15 x Relay 6 x Capacitance6 x Porcelain Ring1 x Coil1 x Transistor 1 x Diode2 x Connector2 x Copper Wire1 x User Manual Note:There are many parts, please be careful and patient when assembling.