1. Accuracy: +-1.5dB(based on the standard sound source 94dB@1KHz)
2. Frequency response range: 31.5Hz～8.5KHz
3. Dynamic state range: 50dB
4. Measuring range: 30~130dBA，35~130dBC
5. Frequency weighting character : A weight and C weight
6. Numerical digit display: 4 digits,resolution 0.1dB, sampling frequency 2 times/second
7. Dynamic scale display: 1 scale equals 2dB or 1dB, sampling frequency 2 times/second
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: 10mV/dB, 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: 3×1.5V AAA (not included)
16. Working temperature and humidity : 0 C~40C，10%～80% RH
17. Storage temperature and humidity: -10C~60C, 10%~70%RH