Sound Level Meter 9.6inch LCD Screen Fast Response 30‑130dB Wall Mount Noise Decibel Reader for Classroom Home Street Item Type: Sound Level Meter Material: ABS Measurement Range: 30~130db Accuracy: ±1.5dB (Based on Standard Sound Source, 94dB 1KHz) Frequency Response: 31.5 Hz~ 8.5 Khz Frequency Weighting: A Weighting Response Time: Fast (Fast) Microphone: 6mm Condenser Microphone Digital Display: 3 Digits Resolution: 0.1dB (<100db) 1dB (>100dB) Alarm Alert: Support Alarm Output: Support Storage Function: 2 Seconds Per Stroke, Can Be Stored for 1 Year Communication with PC: Communication with PC Via USB Cable Display: 9.6 Inches Power Supply: DC5V 1A Microusb Interface Working Temperature and Humidity: 0~40℃, 10%~80%RH Storage Temperature and Humidity: -10~60℃, 10%~70%RH