The band is adjusted by the upper knob on the tuner panel, and the SWR is adjusted by the lower knob. The tuner connector is a male M connector. Three adapters are included: L-type female M connector - BNC male connector, L-type female M connector - male M connector, and straight female M connector - BNC male connector. POWER: less than equal 30W SWR: less than equal 1.5 1.8-30 MHz, antenna extends to 2 meters in length, with a 14 MHz inductance coil, meaning 14 MHz is the natural resonance frequency, and the other frequencies are compensated by a small antenna tuner. The rated power tolerance is 30W, and the power tolerance for the 14 MHz band is doubled. For the UV band, remove the two extension rods and the inductance coil, and directly screw the telescopic antenna onto the tuner. The antenna installation position has hand-tightening screws and copper lugs. You need to solder a 20-meter-long wire to the copper lug, which as a long wire antenna. Antenna tuning steps: Connect a 5-meter-long wire to the M connector housing of the antenna as a ground wire. Turn the upper knob to the 14 mark and the lower knob to the 3 mark. Connect the antenna analyzer. Pull out the telescopic antenna fully and retract it by one section. Observe the curve on the antenna analyzer and fine-tune the telescopic antenna to find the 14.270 MHz resonance point. Mark the length position of the telescopic antenna with a marker pen. In use (for all bands), use the marked position as the reference for the best point! Colour:Black Material:plastic Package Contents: 1 * QRP Shortwave Antenna Set 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.