The HMD 300 S single-sided broadcast headset offers innovative communication solutions at great value. The closed-back, circumaural headphone design delivers a frequency response of 60 Hz to 25 kHz. At the same time, ActiveGard limiting technology, compression technology, and passive ambient noise attenuation exceed your audio quality expectations, while a super-cardioid, dynamic microphone ensures you will be heard loudly and clearly.Main Features:Single-sided earcup design headset ideal for dynamic communication environmentsDynamic super-cardioid microphone for clear communication in noisy environmentsSwitchable ActiveGard limiting technology for protection of noise peaks <110dBFlexible microphone boom for left- or right-hand side configurationLinear sound reproduction for optimized for speech intelligibilityComfortable padding for extended use in long wearing sessionsClosed passive earcup construction for superior ambient noise attenuation in loud environmentsFoldable earcup design for easy, space-saving storageSpecifications:Transducer principle: dynamic, closed (Headphones) | dynamic (Microphone)Total harmonic distortion (THD): < 0.1% @ 1 kHz, 100 dB SPLFrequency response: 60 Hz - 25,000 Hz (Headphones) | 40 Hz - 18,000 Hz (Microphone)Frequency response: 40 Hz - 18,000 HzMax. sound pressure level: 123 dB SPL (ActiveGard off)ActiveGard: 110 dB SPL @1 kHzTemperature range: -15 C to +55 C (Operation) | -40 C to + 70 C (Storage)Impedance: 64 Q (Headphones) | 300 Q (Microphone)Output voltage: 0.5 mV/Pa @ 1 kHzWeight (g): 240 g (without cable)