Reddit reviews 3M PELTOR Tactical Earplug TEP-100, 1 Kit EA/Case

Rechargeable electronic earplugs help reduce loud noise while amplifying low level soundsIntuitive one button operation turns unit on and off and selects high or normal volume settingLithium Ion battery provides up to 16 hours of continuous operation between chargesPortable charging case powered by 3 AA alkaline batteries or USB (Micro B) portChoice of replaceable communications eartips designed to fit most ear canal sizes: UltraFit Communication Tip (23dB), Triple C Communication Tip (27dB), and Skull Screw Communication Tip (30dB)Tactical earplugs and portable charging station (with cover and USB ports closed) are IP67 compliant and water resistant (immersion of up to 1 meter for 30 minutes)