This is an easy to use and handy Mini Sound Level Meter. Designed for sound quality control that measures sound level from 30dBA up ~ 130dBA. It has auto range, wide measuring and frequency range (31.5Hz ~ 8.5KHz). A practical little tool great for noise pollution monitoring, home theater setup, health and safety compliance, vehicle noise testing, etc. Features:Wide dynamic rangeCompact and pocket-sizeInstantaneous Sound Measure FunctionAutomatic Backlit DisplayDigital Display with Auto RangeUses dBa as unit of measurement±1.5dB high accuracyEasy one-hand operation with 1-button operationMaximum Hold functionLow battery indicationAuto power off design for energy savingLarge and clear LCD screen9V battery operation (included) Package Included:1* sound level meter1* battery,