Closed headset with condenser microphone for broadcast and intercom. 250 ohm. Immunity to high-frequency disturbance (RFI) caused by GSM, DECT, UMTS, Tetra, etc. Excellent isolation from ambient noise (based on DT 770 PRO). High-quality condenser microphone capsule with cardioid characteristic, high noise cancellation and feedback prevention. Soft circumaural softskin ear pads. Made in Germany.