"Sennheiser HMDC 27 Professional Broadcast Headset - over-ear desin, closed back, NoiseGard (active noise reduction) reducing the noise level by additional 15dB, no batteries needed, it is conveniently powered via the..."

Hear-Talk Combination Innovative twist joint for microphone arm, Ear piece: Dynamic, closed, circum-aural, Nominal impedance 80 Ohms, Frequency range 10-30,000 Hz, Sound pressure 100 dB, Weight without cable 240 g,...