Radians Vertex Electronic Low-Profile Earmuff - Radians Vertex Electronic Low-Profile Earmuff is the hearing protection solution for the range and in the field. Dual stereo microphones amplify sounds and advanced circuity protects for dangerous noises with no lag time. Fast charging Li-ion power cells provide longer run times with no need to buy replacement batteries. Durable stealth rubber coating enhances sound protection. Ultra Slim Design Sound Compression over 85 dB Dual Microphones Rechargeable Lithium-Ion Battery (Micro-USB cord included) Rubberized Paint for Soft-touch Feel Compact Folding Headband NRR rating of 19dB