This product has been discontinued. Replaced by SL400 - Personal Noise Dosimeter with USB Interface
Extech 407355  

407355: Noise Dosimeter/Datalogger with PC Interface

Measure total sound exposure over an 8-hour period

407355 is a Personal Noise Dosimeter Datalogger which performs OSHA and IEC Noise accumulation surveys to measure total sound exposure over an 8-hour period. Datalogs up to 4500 readings when used as a sound level meter. Stores up to 5 dosimeter surveys. Data includes: start/stop time, %Dose, TWA and peak flags. Complete with belt clip, clip-on 0.5 in. microphone with 2.6ft cable, software, 4 AAA batteries, mini screwdriver and carrying case.