Sound Level Min. dB = 30 / Sound Level Max. dB = 130 / Sound Level Resolution dB = 0.1 / Sound Level Accuracy dB = 1.4 / Response Time (Fast) ms = 200 / Accuracy Class = Class 2 / Response Time (Slow) ms = 500 / Microphone Type = 1/2 " Condenser / Interface Type = RS232 / Interface Type = USB / Display Type = LCD / Battery Type = 6x AA / Frequency Measuring Range Max. kHz = 8 / Frequency Measuring Range Min. Hz = 31.5 / Built-in Calibrator = No