Features: 1. It can convert sound into electrical signals, process data anddisplays results on LCD.2. Mini handheld noise meter with light weight, easy and convenient touse.3. Designed for sound quality control that measures sound level from30dBA ~ 130dBA.4. Equipped with sponge ball to filter out unwanted signals.5. Great tool for monitoring noise levels in hotels, conference halls,home theater, hospitals, and any other noise sensitive environments.Specifications: Color; WhiteMeasuring Range: 30~130dB, 35~130dBCFrequency Weighting Characteristic: A & CAccuracy: 1.5 dBDigit & Resolution: 5 bits & 0.1dBFrequency Response: 31.5Hz ~8.5KHzTime Weighting: FAST / SLOWSampling Rate: 2times/secondMicrophone: 1/2inch Capacitance MicrophonePower Supply: DC 6V 100mA Adapter or 4pcs 1.5V AA Batteries (NOT included)Dimension: 256*70*35mm / 10.08*2.76*1.38inWeight: Approx. 816gPackage List:1x Digital Noise Meter (Batteries is NOT included)1x Output Line1x Windproof Ball1x Manual1x Box.