Noise meter by Smart Sensor having following features

1.   LCD display 

2.   Low battery display

 3.   Automatic shut-down

 4.   PWM output (only BK-NM1356)

 5.   Calendar function (only BK-NM1356)

 6.   Can store 4700 data (only BK-NM1356)

 7.   USB computer interface (only BK-NM1356)

 8.   Supporting computer analysis software (only BK-NM1356)

 9. AC / DC signal output (only BK-NM1356,BK-NM1357,BK-NM1358)

 10. Overload display: OVER / UNDER symbol representation (only BK-NM1356,BK-NM1357,BK-NM1358)

 11. Automatic sensor backlight (only BK-NM1356,BK-NM1357,BK-NM1358)