These Vevor safety earmuffs combine hearing protection with Bluetooth 5.1 wireless connectivity for work and outdoor use. They feature NRR24 noise reduction, a 33' wireless range, and a built-in 750mAh rechargeable lithium battery for extended listening and talk time. Soft noise-canceling foam cushions and an adjustable headband help provide all-day comfort. They are designed for shooting, hunting, construction, manufacturing, and lawn care environments.