It can be equipped with long wire, GP, inverted V, positive V, dipole antennas, etc. It can be applied to any shortwave machine within 200w (as long as it can output 5-15w during tuning) With continuous radio frequency, you can tune. Such as am, cw, fm), without control line, short wave automatic tuning The relay adopts , 12V, 10A, 16A high-power relay. Adopt PIC16F1938 MCU and 7 LC combinations were used. Adopt 7 hollow inductors design, and adopt 6 kV, high voltage ceramic chip capacitor. Adopt -12V, 10A relay, MAX, 200W, it is recommended to use no more than 150W for a long time. This tool set not includes the shell, you can make a shell for it as you like. The tuning impedance - is 5ohm~1.1Kohm. Tuning impedance range: 5ohm~1.2Kohm Power supply voltage range: 11-15 V DC Maximum current consumption: 600 mA Maximum working power: 200 watts Power required to start tuning: 10 watts The smallest possible measurement power: 0.1 watts Power measurement accuracy: 10% Maximum installation inductance: 10H Minimum installation step of inductance: 0.05H Maximum installed capacity: 869 pF Minimum capacitance installation steps: 5pF Typical consumption 200-500 mA Colour:As Shown Material:plastic+metal Package Contents: 1 x ATU-200 turner board 1 Set x accessories 1 x Case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.