Model: 525A
Measuring range: 30-130db
Frequency range:31.5hz-8.5khz
Response time:fast
Microphone:6mm capacitance microphone
Power supply;DC5V 1A micro USB outlet
Operating condition: 0-40 degree
Dimension:210x130x28mm
Weight: 453g

Features and Functions:
1. Accuracty: + -1.5dB In Standard audio: 94dB 1 khz
2. Measurement Range: 30 - 130dB
3. Frequency Response Range: 31.5 hz - 8.5 khz
4. Frequency weighting: A (Environmental Noise) of Weighting
5. Fast answer