Large LCD screen with digital reading. Fast and Slow dynamic characteristic modes. Auto power off design for energy saving. Portable, easy to use and handy instrument for sound quality control. Suitable use in factory, office, home, school and construction site. 1.Level Range LoA=35-100dB 2.Accuracy +3dB (ref 94dB @1kHz) 3.Frequency Range 31.5Hz to 8k Hz 4.Frequency Weighting A 5.Battery Type 9V battery 6.Operation Temp 0 ℃ -40 ℃ (<80% R.H.) 7.Storage Temp -10 ℃ ~60 ℃ (<70% R.H.) 8.Max and Min Hold Function Products Properties: Model: HT-80A Accuracy:±3dB(ref 94dB @1kHz) Frequency Range:31.5Hz to 8k Hz Frequency Weighting :A Level Range: LoA=35-130dB Resolution: 0.1dB Digital display: LCD Battery Type:9V battery Operation Temp: 0 ° -40 ° (<80% R.H.) Storage Temp: -10 ° ~60 ° (<70% R.H.) Specifications: Color: black and yellow and gray Size: 17*5.8*3.5CM Package weight:140g Retail packaging Package included: 1 x Mini Sound Level Meter 1 x Battery Product Packing:Comes with original retail box