-- 2 High-gain Omni Directional Microphones -- 9x Hearing Enhancement -- Power: 50db -- Adjustable Frequency Tuning (aft) -- 2 Independent Volume Controls -- Sound Activated Compression (sac) -- Noise Reducing Rating: Nrr 27db -- Compact Folding Design -- Antimicrobial Ear Pads -- Includes 2 AAA Batteries