HT-850Digital Sound Level Meter with scale range: 30dB-130dB 1.Accuracy :1.5dB 2.range: 30dB- ... bands: A, HT-850Digital Sound Level Meter with scale range: 30dB-130dB1.with a panoramic backlight (scale range: 30dB-130dB) 2. Two measurement method ... provides the accuracy of 1.5dB 3.The compact novel, with high-performance, comply with ...