Otto NoizeBarrier Micro Rechargeable Electronic Earplug OTTO’s NoizeBarrier Micro high-definition and rechargeable electronic earplugs offer unsurpassed situational awareness and clear communication, while providing hearing protection from loud noises. The dual-mode NoizeBarrier earplugs offer active hearing protection as well as hearing enhancement for extremely effective sound localization and detection. Features: - 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 - Earpiece and case IP67 water resistant - Charging status LCD panel - 1-year warranty Specifications: - NRR: 25 dB(Foam Tips); 25 dB (3-Flange Tips) - Frequency Response: 40Hz - 16kHz - Transducers: Balanced armature receivers (speakers), Wide bandwidth, low-noise MEMS microphones - Battery Performance: - Earplugs: Up to 16 hours - Charge Station: 20 earplug charge cycles