Features 【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. 【Easy to Carry】: This is a portable antenna tuner, so you can take with you wherever you want to use. 【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. 【High Quality Capacitors】: The antenna tuner uses high quality brand chip capacitors, C channel capacitors, 1000V high voltage chip capacitors, and imported PIC chips. 【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. 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. Package List 1 x PCB Board 1 x Connection Line 1 x IC 2 x Plug 15 x Relay 6 x Capacitance 6 x Porcelain Ring 1 x Coil 1 x Transistor 1 x Diode 2 x Connector 2 x Copper Wire 1 x User Manual