Walkers Elite Power Muff Digital Quads with black finish; 4 wind resistant high frequency stereo microphones for precise sound directionality; 9x Hearing Enhancement with 50dB of power; Nano-coated for moisture protection; Adjustable Frequency Tuning (AFT); 2 independent volume controls; Sound-activated compression (SAC); Noise reducing rating NRR 24db; Anti-Microbial Ear Pads; 32ms Reaction Time; Power is (2) Energizer AAA batteries (included).