SNDWAY Handheld High Precision Noise Decibel Meter 1. Accuracy: +-1.5dB(based on the standard sound source 94dB@1KHz) 2. Frequency response range: 31.5Hz8.5KHz 3. Dynamic state range: 50dB 4. Measuring range: 30~130dBA35~130dBC 5. Frequency weighting character : A weight and C weight 6. Numerical digit display: 4 digits,resolution 0.1dB, sampling frequency 2 timessecond 7. Dynamic scale display: 1 scale equals 2dB or 1dB, sampling frequency 2 timessecond 8. Dynamic scale shift: 30~130dB, 30~80dB, 50~100dB, 80~130dB 9. Overload display: "OVER"and"UNDER in display screen 10. AC signal output: 0.65Vrms for each shift and full scale, the output of impedance around 600ohm 11. DC signal output: 10mVdB, the output of impendance around 100ohm 12. Dynamic character: Two choices of reaction rate "FAST" and "SLOW" 13. Microphone: 6mm capacitor microphone 14. Max locking: MAX 15. Battery: 31.5V AAA (not included) 16. Working temperature and humidity : 0 C~40C10%80% RH 17. Storage temperature and humidity: -10C~60C, 10%~70%RH