The new 3M Noise Indicator alerts users to potentially dangerous noise levels, helping identify areas where hearing protection may need to be worn, the company says. The Noise Indicator can be easily clipped on to a shirt or jacket, and features an LED light that delivers a clear indication when noise levels exceed a potentially hazardous threshold, 3M says. A red flashing LED light means the noise levels are above 85 decibels, therefore hearing protection may be required. If the noise levels are below 85 decibels, however, green LED light flashes indicating that hearing protection may not be necessary. The Noise Indicator’s small size and lightweight design make it ideal for workers in a variety of industries, the company says. It includes a rechargeable battery that lasts for up to 200 hours between charges.