SOUND LEVEL METER The Extech HD600 datalogging sound level meter offers 3 selectable ranges from 30 to 130dB for taking readings. The Extech HD600 datalogging sound level meter holds up to 20, 000 records. While connected to a PC, the Extech HD600 datalogging sound level meter can capture up to 10 readings/ sec with real date and time stamp. The Extech HD600 datalogging sound level meter also features a min/ max, data hold, and an auto power off with disable functions. The Extech HD600 datalogging sound level meter is constructed from heavy duty, rugged, double-molded housing and also has a USB port. Features:  * High accuracy datalogging of up to 20, 000 records * Three ranges from 30 to 130dB * Capture up to 10 readings/ sec when connected to a PC * Records readings with real date and time stamp * Min/ Max and Data Hold functions * Heavy Duty rugged double molded housing * USB port includes software * Auto power off with disable capability * Meets new IEC 61672-1 Class 2 accuracy standard for OSHA and other local and national noise ordinances Specifications:  Range 30 to 130dB Basic accuracy ± 1.4dB Weighting A and C Response Time Fast/ Slow Analog Output AC/ DC Datalogging 20, 000 points PC Interface USB Dimensions 10.9 x 3 x 2 " ( 278 x 76 x 50mm)  Weight 12.3oz ( 350g)