Walkers' Ultimate Power Muff features four (quad) high gain omni-directional microphones and 9x hearing enhancement with 50 dB power. It has AFT with two independent volume controls, sound activated compression, and an NRR of 26dB. The Ultimate Power Muff features a compact, folding design with anti-microbial ear pads. It operates on 2 AAA batteries (included).
Specifications:

Type	Electronic Earmuff
Color	Black
NRR	26 dB
Quantity	1 Pair
Style	Over the Head
AFT Circuit	Yes
Battery	AAA (2) Included
Compression Circuit	Yes
Material	Polymer