Foldable electronic ear defenders with ABS cups, in a matte finish. Pads filled with synthetic foam. Coolmax® headband for extra comfort, adjustable in height. ON/OFF and volume switch button on each cup, for right/left use separately. 2 omni directional microphones outside, connected to 2 loudspeakers inside the cups. Hunting system: amplification of voices and alarm signals to avoid the risk of insulation on the job. System of amplification shuts off automatically and reverts to passive ear defender mode, in the case of impulsive noise which reaches 80/82 dB: protection against hazardous noises. Requires 6 batteries AAA, not included.