The MSL-388SD sound level data recorder is renowned for its exceptional accuracy and long-term stability, complying with IEC 61672 class 2 standards, equipped with both fast and slow time weighting functions. - High precision and long-term stability - Automatic range measurement, measuring range of 30-130 dB - SD card data download for easy data management - Built-in data retention functionality, recording maximum and minimum values - Supports RS232/USB interface and analog output