Description:   HT-80A Digital Sound Pressure Tester Level Meter 30~130dB Decibel Noise Measurement   Features:   1.Comes with compact and lightweight design、 designed to fit comfortable in your palm. 2.Measurement Range: 30dBA~130dBA、 Accuracy Within +\/-1.5dB; Resolution: 0.1dBA. 3.Data hold function; Large LCD screen display. 4.Max\/Min sound level measurement. 5.Perfect for measuring noise levels in factories、 offices、 theaters and audio systems to give you accurate readings in a greater range than similar products in the market.   Specification:   1.Auto Power off: After 15 minutes with disable feature 2.Memory Recall: Record and Recall MAX and MIN readings 3.Level Range: 30-130dB 4.Accuracy: +3.5dB (ref 94dB @1kHz) 5.Frequency Range: 31.5Hz to 8k Hz 6.Battery Type: 9V battery(NOT included) 7.Operation Temp: 0 C -40C (!#!amp!*!lt;80% R.H.) 8.Storage Temp: -10 C ~60C (!#!amp!*!lt;70% R.H.)                             Package Included:         1x HT-80A Digital Sound Level Meter(battery is not inlcuded)     1x English User Manual  Note: The battery is not included.  Details pictures: