* Real time datalogger ,save the measurement data along the time
information ( Year, month, date, hour, minute, second ) into the SD memory
card and can be downlodeed the Excal ,extra software is no need.
* Frequency and time weighting meet ANSI 1.4 / IEC61672-2013 class 2.
* Auto range : 30 to 130 dB.
* 3 manual range :
30 to 80 dB, 50 to 100 dB, 80 to 130 dB.
* A/C frequency weighting.
* Fast/Slow time weighting.
* Peak hold, Data hold.
* 4 to 20 mA,signal output.
* Record (Max ,Min ) Data hold ,zero adjust.
* SD card capacity : 1 GB to 32 GB
* Dot matrix LCD display.
* Power by UM4/AAA ( 1.5V ) x 6 batteries or DC 9V adapter
* RS232/USB computer interface.