First of its kind multi-mode adjustability providing Active Noise Reduction (ANR), Active Noise Cancellation and both simultaneously 3 Distinct hearing protection modes: Enhanced, Move, Clarity Industry-leading sound localization for maximum situational awareness and sound detection Slim earcup design layered with sound barrier technology High-definition speakers with enhanced electronics Speed-change battery compartment works with either two AAA batteries or one CR123 battery 160-300 hour run time (mode dependent) Noise reduction rating (NRR) of 26dB