Bluetooth 5.4 Hearing Protection with 120H Working Time, 30dB Large, Black
Certified by ANSI S3. 19 (US) and CE EN352-1 (EU). Bluetooth 5.4 Technology:Our Bluetooth Hearing Protection muffs is engineered with the latest Bluetooth 5.4 Technology that provides a more stable connection than Bluetooth 5.0/4.2.