The Kenwood AT-130 external manual antenna tuner covers eight HF ham bands from 80 through 10 meters. Input 50 ohms unbalanced. Output impedance is 20 to 300 ohms. Through power is 150W (120 on 80 meters). Insertion loss is less than 0.5 dB. Minimum power required 2W. Input and output connection: SO239. Ground connection is a wing nut. There is DC input jack on the rear panel if you wish to apply 12 VDC for meter illumination. Physical: 6 x 2.4 x 6.3 inches 3.5 lbs. (152x60x159mm 1.6kg). Click here to view specifications.