The NoizeBarrier TAC is the industry's first fully modular tactical communications headset featuring industry-leading hearing protection and 360? advanced situational awareness to enhance decision making in a tactical environment. OTTO has collaborated with tactical operators to design and engineer a headset that meets the demands of todays modern soldier. The result is a headset that improves the ability to hear important conversations or commands in areas with high-background and potentially harmful impulse noises. The NoizeBarrier TAC headset delivers an unparalleled soundscape experience by producing crystal clear radio communications and has an external microphone that allows for a state of the art talk-through experience. Specifications for OTTO Engineering NoizeBarrier TAC: Manufacturer: OTTO Engineering NRR: 23 dB Quantity: 1 Size: One Size Application: Tactical Battery Type: AAA Battery Quantity: 2 Battery Life: 75 hours Operating Temperature: -40 - 71 Celsius Headphone Style: On/Over Ear Gender: Unisex Features of OTTO Engineering NoizeBarrier TAC: Dual-coil speakers and proprietary NoizeBarrier technology automatically adapt loud or impulse sounds to a safe level, while normal-level sounds, nearby conversation and radio communications are easily heard without clipping or shut-down of the situational awareness functionality. Noise-canceling boom microphone has built-in wind and noise reduction technology that virtually eliminates background noises and ensures understandable radio transmissions in loud environments. 360-degree situational awareness microphones build into each earcup provide accurate sound localization to detect the direction of potential threats with near certainty Easy-access volume controls on the left earcup adjust sound to five different levels. Available with fixed or modular quick-disconnect cables to meet a wide variety of comms needs. Ultra-soft Comply foam ear cushions form a tight seal around the ears to significantly reduce the effects of unsafe noise levels. Snap off to easily replace in the field when needed. Multichannel, multi-radio options are available when used with the OTTO Multi-Port Hub PTT Low-profile earcup design will not interfere with shouldering a firearm. Optional rail-mount kit allows the user to easily convert the headset from over-the-head style to top or rear rail mount in the field without tools. Compatible with major Hi-Cut helmet systems including Ops-Core and Team Wendy. Talk time of 100 hours if 2 AAA lithium ion batteries are used. Auto idle shutdown will not degrade with depleting batteries Package Contents: OTTO Engineering NoizeBarrier TAC