Sennheiser HMD27, Professional Broadcast Headset, Circumaural design, Closed-back, Two-piece headband (for those who prefer a conventional headband, a wide headband padding is included that converts the two-piece headband into a compact single piece), Swivelling ear cup for single sided listening, Swivelling microphone can be worn either on the right or the left hand side, ActiveGard limiter protects against sudden noise peaks when activated: > 110 dB, Impedance: 64 Ohm, SPL (sound pressure level): 128 dB SPL at 1 kHz, Maximum input level: 500 mW, Frequency response (headphones): 8 - 18000 Hz, Dynamic microphone: Type BMD 434 (directional characteristic: hypercardioid; impedance: 300 ohm; frequency range: 40 - 18,000 Hz), Microphone sensitivity: 0.5 mV/Pa @ 1kHz, Weight: 240 g, Includes a wind shield, pop filter, and a cable clip@+*Note:* Cable is not included. Cables from the 26-II Series are compatible with this headset.@+@+, Suitable cables available under: Article Nr #251432#, Article Nr #448025#, Article Nr #448028#