3M™ NI-100 Noise Indicator

Hearing Conservation Program to help ensure workers know when and where to wear hearing protection. It alerts users to potentially dangerous noise levels, identifying areas where hearing protection may need to be worn.
• 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
• Small, lightweight design (2"L x 1.4"W x 5"D) with a rechargeable battery that operates for up to 200 hours between charges. Mini-USB plugs into bottom port of device
• Auto Power Off – device will power off after approximately 10 hours