About This Durable ABS-shell and double thickened noise canceling foam Imported ADVANCED BLUETOOTH TECHNOLOGY—With the latest Bluetooth 5.3 technology that provides a stronger and more stable connection. You can move freely in your work environment and answer phone calls easily, the wireless range is up to 80ft, and it also has a HI-FI sound quality that provides you with a smooth music experience EFFECTIVE HEARING PROTECTION— High noise reduction rating up to 30dB which meets the European & American standards for noise reduction and will protect your hearing from hazardous sound levels during lawn mowing,woodwork or construction UP TO 40-HOURS BATTERY LIFE— Built-in 1500mAh rechargeable battery. Listen to your favorite audio content all day long. 40 hrs playtime per charge at Bluetooth mode and unlimited playtime at wired mode COMFORTABLE & DURABLE— We redefine the headband of muffs, and it’s wider, thicker, softer, and much more comfortable. Weighs only about 0.66lb and equipped with black leather bag, easy to carry&stain-resistant PREMIUM QUALITY—We have a better standard for the ZOHAN EM037, the material and workmanship is second to none,and it’s made of truly high-grade ABS plastic and PVC leather