Wireless closed reference studio-quality headphones with the possibility of Bluetooth connection via NFC, which are upgraded model of succesful AKG K550 headphones: but they offer richer bass response and more ergonomically shaped cushions that increase comfort. The control buttons are located directly on the ear cup. Headphones are equipped with special 50 mm drivers, which together with closed headphone design ensures accurate sound and eliminates background noise. Easy transfer and handling is ensured by folding system 2D and rechargeable battery with a lifespan of up to 8 hours. Headphones offer a frequency range of 20 Hz-20 kHz and an impedance of 32 Ohm. Black colour design.