Wireless dynamic semi-open headphones that push the sound level of personal experience to the next level. They offer PPL (phase-locked loop) synthesized tuner for optimum transmission and automatic frequency control with automatic tuning functions that ensure optimum reception in all conditions. In addition, they are equipped with a headband that adapts to the shape of the head and breathable fabric ear pads that provide high comfort even during extended wearing. Headphones offer a frequency range of 18 Hz-20 kHz and an impedance of 32 Ohm. Power source are rechargeable batteries that are included. Regular use is simplified by docking charging function and three user adjustable frequencies in case of interference. Weight: 280 g, black colour design. Frequency: 864MHz (EU+UK), 916MHz (US+Aus).