USB Charging Cable for Noise Indicator - MMM53575

Alerts users to potentially dangerous noise levels, helping identify areas where hearing protection may need to be worn. Just attach indicator to a shirt or jacket; its LED light delivers a clear indication when noise levels exceed a potentially hazardous threshold. Red Flashing LED: Noise levels are above 85 dBA – hearing protection may be required. Green Flashing LED: Noise levels are below 85 dBA – hearing protection may not be necessary. Rechargeable battery that operates for up to 200 hours between charges. Sold individually. Show Less