The Suppressor Earbuds deliver reliable noise protection with a 25dB Noise Reduction Rating and split-second Sound Activated Compression, which effectively blocks sharp sounds such as gun blasts. Four omnidirectional microphones (two per earbud) ensure crisp, clear audio, while full dynamic range HD speakers deliver balanced sound. These earbuds are capable of delivering up to 9 hours of runtime per charge, for a total of 36 hours worth of use with the included charging dock. Suppressor Earbuds are designed for all-day comfort with the included three sizes of memory foam tips, locking fins, and silicone tips for a custom fit.