1.Small size and light weight 2.Fit on shoulder or wrist 3.Measuring noise exposure 4.Comply with hearing protction standard FEATURES Attractivedesign, mini—sized and weighs only 85gModulardesign, cable—free and dual channelsComplywith IEC61672, IEC61252 and ANSI S1.25Rechargeable lithium polymer batterySoftwarepackage, downloads to PCVarietymounting methods USES Precisionnoise ...