The K305 UHF II are excellent wireless hi-. headphones with a powerful bass range. Battery life is approx. 10 hours, and UHF technology provides a range of up to 100 m (330 ft.) for reliable reception even through walls or ceilings. The K305 UHF II ensure consistent audio quality and are ideal headphones for use in your apartment, house, or garden. Removable fabric ear pads and the proven self-adjusting headband provide maximum comfort. The rugged transmitter is also a convenient storage cradle and charger so the headphones are always ready for use. The same transmitter can cover several AKG wireless headphones simultaneously.