The SL400 is a personal noise dosimeter with a USB interface. For employees exposed to loud noises, sound level monitoring is essential to determine what protective measures are necessary. Conduct noise collection surveys to assess the overall sound exposure over an 8-hour period. The SL400 is a compact, lightweight dosimeter designed for noise exposure and provides noise monitoring for compliance with standards. It includes PC software for controlling setup and retrieving stored events or analyzing real-time measurements. Complete with a belt clip, clip-on microphone, cable, windscreen, 9V battery, software, USB cable, and carrying case.