This 6 foot USB 2.0 5-Pin Mini Cable connects a computer or USB hub to the 3M™ Noise Indicator NI-100 for quick and easy recharge. Need Help? Questions? We can help Contact Us 3M™ Noise Indicator The new 3M™ Noise Indicator offers easy, durable noise level detection, helping identify areas where hearing protection may need to be worn. This 6 foot USB 2.0 5-Pin Mini Cable connects a computer or USB hub to the 3M™ Noise Indicator NI-100 for quick and easy recharge. Need Help? Questions? We can help Contact Us 3M™ Noise Indicator The new 3M™ Noise Indicator offers easy, durable noise level detection, helping identify areas where hearing protection may need to be worn.