The mAT-125E tuner is a compact and lightweight antenna tuner with built-in LiIon batteries. This makes it perfect for portable use, for example during a field day or SOTA activation on a hike. Due to the universal tuning, this tuner can be used with radios of all manufacturers, the only condition is that the transmission power can be reduced to 1 to 20 W. In the fully automatic mode the tuner starts tuning as soon as RF power is present, in the semi-automatic mode tuning only takes place after pressing the tune button.