It offers a noise reduction rating of 23DB. A high-performance digital audio circuit delivers blazing-fast reaction time. There are 4 frequency modes to it and they are universal, clear voice, high-frequency, and power boost. The Walker's Firemax Bluetooth Digital Muff all new digital Omni directional microphones have a slim low profile design with rubberized spray. It has rechargeable (USB-C) with up to 200 hours of battery life with 2000mAh and full dynamic range HD speakers for clear and balanced sound.