The NI S102 is a handheld compact sound level meter with automatic ranging (LO/MED/HI). Because of the integrated sensor/probe, the instrument can be used with one hand. On demand, the sound level meter can be switched between slow or fast reading and A or C frequency. Features of NI S102 sound level meter: Automatic ranging LCD Backlight Min – Max hold Auto Power Off Slow and fast reading Analogue DC