[. . . ] SH300 A perfect balance Ultra light independent over-theear headset with ergonomic design for maximum comfort Noise Cancelling microphone blocks out a great amount of ambient noise, making your voice easier to understand Ideal for professionals who need to keep in touch with what is going on around them and for extended periods of use An active guard for your hearing The SH 300 is an ultra lightweight headset, all purpose monaural solution for longer conversations. [. . . ] Lightweight 29 gram headset with perfect individual fit Item No. : 502177 Technical data Transmission data Microphone . . . . . . . . . . . . . . . . . . . . . . . Noise Canceling 100 Hz ­ 3400 Hz -34 dB Less than 1% 300 300 Hz ­ 3400 Hz 104 dB SPL limited by ActiveGardTM Less than 1% Weight of headset . . . . . . . . . . . . . . . . . Over-the-ear (left or right ear) Personal fit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 m / 3. 3 ft Kevlar®* reinforced Connector . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Regular ø 20 mm / 0. 78 inch Accessories included Carry bag Headset storage hook, clothing clip Microphone windscreen Contact details [. . . ]