Features 1、This welding kit, making easy to understand, easier to learn, easy to use. 2、Comes with standing instructions, fit for Q9 type interface (such as the need to own M-type interface), using T-topology networks, QRP facilitate communication with low-power transceivers (shoes, frogs, octopus, etc.). 3、Used to make transceiver and antenna effective match to meet your emission requirements, ensure efficient communication transceivers. 4、All components are well-selected with high quality and quite great working performance. 5、The kit needs you welding, drilling and installation. Specification Item Type:Antenna Tuner Days when exposed to tune straight power: <20W Days when adjusting the input power tuning: <3W Tuning indication: LED display Operating frequency: 1-30MHz The antenna impedance matching range: about: 30 ~ 300Ω Carrying RF power: less than 15W Tuning required RF power: less than 3W Package List 1 X Waterproof Plastic Box 5 X Positioning Paper Sheets 1 X Circuit Board 1 X Copper Wire 6 X Screw 7 X Nut 12 X Gasket 6 X Resistor 1 X Red Indicator Light 2 X Coil (One Big And One Small) 1 X Dial Switch 2 X Metal Joints 3 X Plastic Nuts (1 Black 2 Gray) 1 X White Rubber Strip Root 2 X Wire (1 Red And Yellow) 1 X Knob Adjustment Module 2 X Tuner Module