... light weight,small moderate[Products] DT-85 A mini-noise meter designed to meet safety engineering, health, industrial safety, ... can control the environment in a variety of sound quality. The noise meter is mainly used in various types of enterprises ... .5Hz ~ 8kHz Range: 30 ~ 130dB Frequency sound level of rights: the right sound level of frequency Microphone: 1 / 2 inches polarized condenser ...