High Accuracy Measuring Technology: With innovative components, this noise measuring tool provides fast and consistent readings in various environments like streets, offices and quiet study spaces Professional Sound Measurement: The HT602A / B decibel tester accurately measures sound intensity from 30 to 130 units, ideal for home, industrial and environmental applications User Friendly Design: Featuring simple single button activation and a clear LCD display, the HT602A / B allows easy real time sound measurement for users of all levels Compact & Strong Construction: Lightweight ABS substance makes this sound meter portable yet sturdy, perfect for use across different locations Versatile Functions: Includes sound retention mode to identify highest intensities and provides multiple measurement preferences for flexible noise analysis, Manufacturer: XIBEIDIANZI