I am selling unused AKG K371 BT wireless headphones. The frequency range is 5 to 40,000 Hz and the impedance reaches 32 Ohm, which does not burden the battery so much and enables loud enough music playback. Sensitivity 114 dB Size of dynamic transducers 50 mm They contain Bluetooth 5.0 and an integrated microphone sold in the original box. I prefer personal collection so that the interested person can try the headphones. Price 130 euros. lengi.lengi@gmail.com