TCI Liberator HP 2.0 Color:Black reversible for left right carry Black reversible for left right carry Black anodized backspacer and lanyard hole Compact stealth enters your pocket with the all black Combining style and practicality for law enforcement and security professionals First of its kind multi mode adjustability providing Active Noise Reduction (ANR) 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