This digital sound level meter is mainly used to test the noise generated normally. It can accurately measure the decibel value of noise. It can constantly monitor ambient sound. It is light weight, compact, ergonomic, and user friendly. Features -Color:Orange -Material:Plastic -Size:15.90X4.90X3.30cm/6.25X1.93X1.30in -Measuring range: 30dBA~130dBA -Accuracy: ±1.5 -Resolution: 0.1 -Frequency range: 31.5Hz~8KHz -Frequency weighting: A -Sampling frequency: 2 times/second -Operating Conditions: : 0-40 degree centigrade Humidity: 1-80%RH -Storage : : -10-60 degree centigrade Humidity: 0-90%RH -Power supply: 3 x 1.5V AAA Batteries (included) -Sound meter calibrated at factory, noise measurement range from 30-130dBA, the measurement range is wide. -Feature data keeping function, automatic/manual , disable automatic shutdown function, battery indication. -With the backlight feature, high-reliability design, and handheld, small and portable sound level reader. -Portable sound level meter is light and compact design, easy to carry with you and operate with one-hand. -Excellent for music recording, home theater settings, neighbor noise , work sites, and monitoring. Package list: 1 x decibel meter