OTTO Engineering NoizeBarrier Micro, Black

Up to 40 dB of impulse noise protection Up to 15 dB adaptive noise attenuation Hearing enhancement mode – amplifies soft sounds up to 5X Natural hearing for safe sounds Accu-Technology high-definition sound quality One-button touch pad, 2-mode operation Rechargeable with up to 16 hours of continuous use NRR: 28 dB(Foam Tips); 23 dB (3-Flange Tips) Frequency Response: 40Hz - 16kHz Transducers: Balanced armature receivers (speakers), Wide bandwidth, low-noise MEMS microphones