Reddit reviews SNDWAY SW-525A 30-130dB Digital Sound Level Meter with Large LCD Display Noise Meter Decibel Wall Mounted Hanging

Measure Range: 30 to 130dB,Product operation is very convenient, just connect the power supply to use (extra power supply needs to be 5V 1A)Accuracy: ±1.5dB(reference sound pressure level, 94dB@1KHz),Frequency Response Range: 31.5Hz~8.5KHzLarge 9.6 inch LCD display with backlight, powered by DC 5V 1A Micro USB Outlet,Note: The device requires an additional charger. When the device is powered on, it needs to match the power supply of the instrument with a 5V 1A charger. If it is too large, it may burn out the circuit board.Note: Pay attention to whether there is any foreign object blocking when using the sensor. If it can be turned on, it will not be displayed, it may be a sensor failure. Please contact us in time, we will handle it for you at the first time.Note: switch machine, short press the switch machine, shut down, long press to open the key shutdown To set the alarm value specifically, you need to check the manual. If there is any problem, please contact us in time.