Combination Dosimeter, Datalogger and Sound Level Meter. This compact sound dosimeter from Lutron is designed for personal sound/noise exposure recording and datalogging. This meter meets IEC61252 and ANSI S11.25 standards for noise dose and sound exposure and IEC61672 Class 2 and ANSI S1.4 Type S for sound level measurement. Comes as a complete kit with 4GB SD card, soft carrying case, instructions, 6 AAA batteries, integrated stand, mounting bracket and condenser microphone with clip. data points, Time weighting (fast & slow) dynamic characteristic modes. • User-defined measurement configurations • Selectable criterion level, exchange rate, threshold, frequency weighting, and response time setting • 0.5" Condenser microphone for high accuracy & long-term stability • Memory function to store the Max. & Min. value • Hold functions. • Real time datalogger o Internal memory device (EEPROM) can record 16,000 data points o External memory device (SD memory card), real time datalogger, with built-in clock and calendar, real time data recorder (sampling time set from 1 second to 3600 seconds) • Manual datalogging is available when you set the sampling time to 0 seconds • Noise dose %SPL measurements • Power: (6) AAA 1.5-volt alkaline batteries or optional DC 9V adapter • RS232 data output to USB (with optional cable) • Heavy duty housing • SD card capacity: 1 GB to 16 GB (4GB card included) • Operating temperature: 32° to 122°F (0° to 50°C) • Operating relative humidity: 0 to 85%