Slim Electronic Earmuff with Dual Microphones and Rechargeable PowerThe Radians Vertex Slim Dual Mic Electronic Earmuff features an ultra slim design with two microphones to enhance surrounding sound. Finished with a soft touch rubberized coating this folding earmuff stores compactly and includes a rechargeable Li ion battery. Ultra slim electronic design Dual microphones Enhances surrounding sound Compact folding storage Rechargeable Li ion battery included