Finished motherboard, come with M connector and porcelain terminal, power socket, plug wire, grounding terminal.You can DIY the shell by yourself. 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. 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:blue Material:plastic Package Contents: 1 x ATU-200 board 1 set x accessories 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.