Feature:1. Can be widely used for household and industrial use, living room noise measurement and company noise, on-site noise etc.2. With LCD display screen, clear readings and easy to use at night.3. It is lightweight, compact, ergonomic, user-friendly and great for monitoring noise levels.4. With maximum/minimum hold, screen lock hold, low battery indication function.5. It will automatically shut down after 30 minutes when not in use to extend battery life.Specification:Condition: 100% Brand NewItem Type: Sound Level MeterMaterial: ABSColor: As shown in the pictureApplicable standardIEC61672-1 category 2Accuracy±1.4 dBFrequency range31.5Hz~8KHzDynamic range50 dBMeasurement level range30dB〜130dBFrequency weightingdBMicrophone1/2in electret capacitorDisplay3 1/2 digitsResolution0.1 dBData update0.5 secondsMaximum holdMaximum valueMinimum holdMinimumScreen lockHoldAuto Power OffThe meter automatically turns off after about 30 minutes. Inactive for 15 minutes.Power supply1 x 9V battery, 006P or IEC 6F22 or NEDA 1604 (not included)Battery lifeAt least 30 hoursOperating conditions-20℃〜60℃,10％RH〜90％RHStorage conditions-20℃〜60℃,10％RH〜75％RHSize(L x W x H)144x55x38mm / 5.7x2.2x1.5inWeight90g/3.2oz.Package List:1 x Sound Level Meter1 x English ManualNote:1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.