The top-of-the-range testo 816-1 sound level meter complies with all requirements with regard to the execution of non-conform noise level measurements according to IEC 61672-1 Class 2 and ANSI S1.4 Type 2. This makes it suitable for carrying out noise level measurements in the workplace as well as in public places, industry and production.The testo 816-1 has all the features which its little brother, the testo 816, has but also comes with a built-in data logger that can save up to 31 000 readings and dedicated PC software.