Features
1. LCD backlit display: 4-digit LCD display, the maximum display to "9999"
2. The sampling rate can be converted freely to "fast/slow" (fast 125 milliseconds, slow 1 second)
3. Maximum value, minimum value, data maintenance
4. Automatic shutdown, overload indication
5. Use of Japan TOREX LDO voltage stability control technology, lower power consumption products
6. Sensor type: 1/2-inch condenser microphone
7. Second level of pollution
8. Battery undervoltage display