2.3" LCD Digital Sound Level Meter 30 ~ 130 dB Decibel Noise Measurement 2.3-inch digital high brightness display Measuring Level: 30 ~ 130 dB(A) (A-weighted decibels), 35 ~ 130 dB(C) (C-weighted decibels) Sound Level: 30 ~ 130 dB with Level selecting button switches Sampling Rate: 20 times / second Weight: approx. 630 g