MASTFUYI Digital Noise Meter Sound Level Meter Handheld DB Meter A- Weighted 30~130dB Audio Measuring Instrument Decibel Monitor

Red/green alarm lights:

Sound level > 60dB, the alarm light is red

Sound level < 60dB, the alarm light is green

MAX:

Measure the maximum sound level

Fast/Slow Mode:

Fast:Reads the sound level in real time

Slow:Reads the current average sound level

Power supply:

2*1.5V AAA Battery