The Quest SoundPro SE-DL Series Sound Level Meters and Real-Time Analyzers are advanced instruments for monitoring and analyzing sound levels. They come in Class/Type 1 and Class/Type 2 models and feature a large screen display for real-time frequency analysis. They can store data for post-processing and evaluation of workplace noise levels. These meters are suitable for a variety of applications, such as occupational noise evaluations, environmental noise assessments, general sound analysis, automotive design and vehicle noise evaluations, building acoustics, HVAC testing, and hearing protection selection.