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: PCB Purpose: Antenna Tuner Model: ATU-100 Maximum Current Consumption: 400mA Number of Installed Inductors: 7 Number of Installed Capacitors: 7 Power Measurement Step of 10 Watts: 0.1 watts Measurement Steps with Power Higher than 10: 1 watt Power Measurement Accuracy: 10% Maximum Installation Inductance: 8.53uh Minimum Installation Inductance: 0.05uh Maximum Installed Capacity: 1869pf Minimum Installed Capacity: 10pf Usage 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.