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 The Liberator HP headset is the next generation in electronic hearing protection, offering crisp, clear audio in a durable, scratch-resistant, slim earcup. The Liberator HP provides enhanced hearing protection in all environments, including those with impulse/gunfire noise and high-decibel, constant background audio. The wearer is protected while advanced sound localization allows for maximum situational awareness and sound detection.