ISOtunes FREE is the first completely wireless Bluetooth hearing protection product from ISOtunes. This product is designed for all-day and extemded use for woodworkers, contractors, lawn maintenance professionals and anyone using power tools or other loud equipment. These true wireless work headphones will protect your hearing while increasing your productivity and making your work more enjoyable. ISOtunes FREE features an ANSI-certified 22 decibel Noise Reduction Rating (NRR) in its proprietary TRILOGY memory foam eartips and is OSHA compliant for use in the workplace with its SafeMax volume limiting technology. The ultra-lightweight earbuds are super-easy to use with 1-button functionality and feature IP45 dust, sweat and water resistance. The earbuds have a rechargeable battery life of 7 plus hours with an additional 14 plus hours in the travel case, which automatically charges the earbuds as soon as they're put away. This product comes with 3 sets of foam eartips and 1-pair of silicone triple-flange eartips, a USB-C charging cable and a protective charging travel case.