Maximum power: 120 watts Operating frequency: 3M-54MHz Working mode: automatic Adjust the wave: most of the antenna can be adjusted to less than 1.5 standing wave Working power supply;compatible with Yeasu radio interface power supply, no external power supply Antenna impedance: 5-1500 ohm Appearance size: wide 13cm, long 20cm, high 4cm About weight: 800 grams Colour:black Material:Metal + Plastic Package Contents: 1 x mAT-30 HF-SSB Automatic Antenna Tuner 1 x Connecting cable Only the above package content, other products are not included. Note: Light shooting 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.