• New generation high performance headsets specifically designed for communications use
• Retains the renowned durability and comfort of the 200 series
• Very robust construction, made from unbreakable flexible composite material
• Similar construction to 200 series, spare parts also available
• Dual-chamber foam-filled earshells, larger than 200 series for wearing comfort
• High acoustic isolation on DMH320 for reduced ear fatigue
• Extended response ear loudspeakers
• Broadcast quality noise-cancelling dynamic microphone
• New boom design allows use with boom at left or right hand side
• Mic switched off by swinging boom upwards
• Boom can be bent into optimum position to suit the wearer

Technical Specification:
• Nominal impedance: 400 ohm each at 1kHz
• Frequency response: 20-20,000Hz
• Sensitivity: 94dB s.p.l. for 1mW
• Distortion: Less than 0.5%
• Max. rated power handling: 0.5 watts
• Microphone: Dynamic type, uni-directional, wired balanced
• Nominal impedance: 200 ohm at 1kHz
• Frequency response: 40-15,000Hz
• Approx. weight: SMH310 220g
• Cable:1.8m (balanced mic with separate left and right ear loudspeakers)